THE SIEGE PERILOUS, A RESERVED SEAT FOR A HOLY CAUSE

Today, The Grandma has been reading an interesting chapter about the Siege Perilous, a special seat which only can be occupied by a special knight who had accomplished a special and sacred mission. 

In Arthurian legend, the Siege Perilous, also known as The Perilous Seat, is a vacant seat at the Round Table reserved by Merlin for the knight who would one day be successful in the quest for the Holy Grail. The English word siege originally meant seat or throne, coming from the Old French sege, modern French siège; the modern military sense of a prolonged assault comes from the conception of an army sitting down before a fortress.

In Thomas Malory's Le Morte d'Arthur, in an account taken from the Vulgate Queste del Saint Graal, the newly knighted Sir Galahad takes the seat in Camelot on Whitsunday, 454 years after the death of Jesus. 

The Siege Perilous is so strictly reserved that it is fatal to anyone else who sits in it. Another version of this story is related in Alfred Tennyson's Idylls of the King.

Originally, this motif about the seat and the grail belonged to Perceval, but the Lancelot-Grail Cycle transferred it to the new Cistercian-based hero Galahad. It appears, for example, in the earlier De Boron Didot Perceval, where Perceval occupies the seat at Arthur's court at Carduel.

According to many scholars, the motif of the dangerous seat can be further traced to Welsh, Cornish, and Breton mythology, where the bulk of the Arthurian legend was derived from. According to this theory, the Siege Perilous was a half-remembered version of a Celtic kingship ritual that has parallels in the Irish Lia Fáil.

The Siege, from the French siège, seat, Perilous is the seat at Arthur's Round Table in which only the chosen knight can sit. In the prose rendition of Robert de Boron's Merlin, the empty seat is reminiscent of the seat that Judas vacated.

There is also an empty seat at Joseph of Arimathea's Grail Table which destroys anyone unworthy of sitting there. In his Continuation to Chrétien's Perceval, Gerbert de Montreuil says that it was sent to Arthur by the fairy of Roche Menor.

Six knights tried to sit in it and were swallowed by the earth before Perceval sits it in and completes the adventure. When he does, the six are restored to Arthur's court.

In the thirteenth-century Vulgate Cycle, Merlin instructs Uther to build a table in commemoration of the Grail Table; at the table, there is an empty seat reserved for the Grail knight. 

In the Queste del Saint Graal, the Siege Perilous is said to parallel the seat of Christ at the Last Supper and the seat occupied by Josephus at the Grail Table. Two brothers, jealous of Josephus, objected to his having a special place, and one of them sat in it, only to be destroyed; so it came to be called the Feared Seat. 

Galahad is the knight for whom the Siege Perilous at Arthur's table is destined. In the Lancelot, a knight named Brumand, trying to perform an act that Lancelot never dared to do, sits in it and is burned to a crisp. Malory says that Merlin made the Siege Perilous for the greatest Grail knight. When Galahad arrives at Camelot, his name appears on the seat destined for him.

More information: King Arthur's Knights

 

 

No man could sit but he should lose himself...

Merlin

KING ARTHUR & THE KNIGHTS OF THE ROUND TABLE

The Grandma loves Middle Age and she likes medieval legends. One of her favourite is King Arthur and the Knights of the Round Table.
 

King Arthur is a legendary British leader who, according to medieval histories and romances, led the defence of Britain against Saxon invaders in the late 5th and early 6th centuries. The details of Arthur's story are mainly composed of folklore and literary invention, and his historical existence is debated and disputed by modern historians. The sparse historical background of Arthur is gleaned from various sources, including the Annales Cambriae, the Historia Brittonum, and the writings of Gildas. Arthur's name also occurs in early poetic sources such as Y Gododdin.

Arthur is a central figure in the legends making up the Matter of Britain.

The legendary Arthur developed as a figure of international interest largely through the popularity of Geoffrey of Monmouth's fanciful and imaginative 12th-century Historia Regum Britanniae, History of the Kings of Britain. In some Welsh and Breton tales and poems that date from before this work, Arthur appears either as a great warrior defending Britain from human and supernatural enemies or as a magical figure of folklore, sometimes associated with the Welsh Otherworld, Annwn. How much of Geoffrey's Historia, completed in 1138, was adapted from such earlier sources, rather than invented by Geoffrey himself, is unknown.

Although the themes, events and characters of the Arthurian legend varied widely from text to text, and there is no one canonical version, Geoffrey's version of events often served as the starting point for later stories. Geoffrey depicted Arthur as a king of Britain who defeated the Saxons and established an empire over Britain, Ireland, Iceland, Norway and Gaul.

More information: Biography

Many elements and incidents that are now an integral part of the Arthurian story appear in Geoffrey's Historia, including Arthur's father Uther Pendragon, the wizard Merlin, Arthur's wife Guinevere, the sword Excalibur, Arthur's conception at Tintagel, his final battle against Mordred at Camlann, and final rest in Avalon.

The 12th-century French writer Chrétien de Troyes, who added Lancelot and the Holy Grail to the story, began the genre of Arthurian romance that became a significant strand of medieval literature. 

In these French stories, the narrative focus often shifts from King Arthur himself to other characters, such as various Knights of the Round Table. Arthurian literature thrived during the Middle Ages but waned in the centuries that followed until it experienced a major resurgence in the 19th century. In the 21st century, the legend lives on, not only in literature but also in adaptations for theatre, film, television, comics and other media.

The historical basis for the King Arthur legend has long been debated by scholars. One school of thought, citing entries in the Historia Brittonum, History of the Britons, and Annales Cambriae, Welsh Annals, sees Arthur as a genuine historical figure, a Romano-British leader who fought against the invading Anglo-Saxons some time in the late 5th to early 6th century.

More information: Live Science

The Historia Brittonum, a 9th-century Latin historical compilation attributed in some late manuscripts to a Welsh cleric called Nennius, contains the first datable mention of King Arthur, listing twelve battles that Arthur fought. These culminate in the Battle of Badon, where he is said to have single-handedly killed 960 men. Recent studies, however, question the reliability of the Historia Brittonum.

The other text that seems to support the case for Arthur's historical existence is the 10th-century Annales Cambriae, which also link Arthur with the Battle of Badon. The Annales date this battle to 516–518, and also mention the Battle of Camlann, in which Arthur and Medraut, Mordred, were both killed, dated to 537–539. These details have often been used to bolster confidence in the Historia's account and to confirm that Arthur really did fight at Badon. 

Problems have been identified, however, with using this source to support the Historia Brittonum's account. The latest research shows that the Annales Cambriae was based on a chronicle begun in the late 8th century in Wales. Additionally, the complex textual history of the Annales Cambriae precludes any certainty that the Arthurian annals were added to it even that early. They were more likely added at some point in the 10th century and may never have existed in any earlier set of annals. The Badon entry probably derived from the Historia Brittonum.

The origin of the Welsh name Arthur remains a matter of debate. The most widely accepted etymology derives it from the Roman nomen gentile, family name, Artorius. Artorius itself is of obscure and contested etymology, but possibly of Messapian or Etruscan origin.

More information: BBC

Linguist Stephan Zimmer suggests Artorius possibly had a Celtic origin, being a Latinization of a hypothetical name *Artorījos, in turn derived from an older patronym *Arto-rīg-ios, meaning son of the bear/warrior-king. This patronym is unattested, but the root, *arto-rīg, bear/warrior-king, is the source of the Old Irish personal name Artrí.  

Some scholars have suggested it is relevant to this debate that the legendary King Arthur's name only appears as Arthur or Arturus in early Latin Arthurian texts, never as Artōrius, though Classical Latin Artōrius became Arturius in some Vulgar Latin dialects. However, this may not say anything about the origin of the name Arthur, as Artōrius would regularly become Art(h)ur when borrowed into Welsh. Another commonly proposed derivation of Arthur from Welsh arth bear + (g)wr man, earlier *Arto-uiros in Brittonic, is not accepted by modern scholars for phonological and orthographic reasons.

More information: Caerleon

Notably, a Brittonic compound name *Arto-uiros should produce Old Welsh *Artgur, where u represents the short vowel /u/, and Middle/Modern Welsh *Arthwr, rather than Arthur, where u is a long vowel /ʉː/. In Welsh poetry the name is always spelled Arthur and is exclusively rhymed with words ending in -ur—never words ending in -wr—which confirms that the second element cannot be [g]wr man.

An alternative theory, which has gained only limited acceptance among professional scholars, derives the name Arthur from Arcturus, the brightest star in the constellation Boötes, near Ursa Major or the Great Bear.  

Classical Latin Arcturus would also have become Art(h)ur when borrowed into Welsh, and its brightness and position in the sky led people to regard it as the guardian of the bear, which is the meaning of the name in Ancient Greek, and the leader of the other stars in Boötes.

The popularity of Geoffrey's Historia and its other derivative works, such as Wace's Roman de Brut, is generally agreed to be an important factor in explaining the appearance of significant numbers of new Arthurian works in continental Europe during the 12th and 13th centuries, particularly in France. 

It was not, however, the only Arthurian influence on the developing Matter of Britain. There is clear evidence that Arthur and Arthurian tales were familiar on the Continent before Geoffrey's work became widely known, see for example, the Modena Archivolt, and Celtic names and stories not found in Geoffrey's Historia appear in the Arthurian romances. 

From the perspective of Arthur, perhaps the most significant effect of this great outpouring of new Arthurian story was on the role of the king himself: much of this 12th-century and later Arthurian literature centres less on Arthur himself than on characters such as Lancelot and Guinevere, Percival, Galahad, Gawain, Ywain, and Tristan and Iseult.

More information: History Extra

I must ride with my knights to defend what was, 
and the dream of what could be.

King Arthur

KING ARTHUR & THE KNIGHTS OF THE ROUND TABLE

Today, The Grandma has been reading about the Arthurian saga. The Grandma loves Middle Age and she likes medieval legends. One of her favourite is King Arthur and the Knights of the Round Table.

King Arthur is a legendary British leader who, according to medieval histories and romances, led the defence of Britain against Saxon invaders in the late 5th and early 6th centuries. The details of Arthur's story are mainly composed of folklore and literary invention, and his historical existence is debated and disputed by modern historians. The sparse historical background of Arthur is gleaned from various sources, including the Annales Cambriae, the Historia Brittonum, and the writings of Gildas. Arthur's name also occurs in early poetic sources such as Y Gododdin.

Arthur is a central figure in the legends making up the Matter of Britain.

The legendary Arthur developed as a figure of international interest largely through the popularity of Geoffrey of Monmouth's fanciful and imaginative 12th-century Historia Regum Britanniae, History of the Kings of Britain. In some Welsh and Breton tales and poems that date from before this work, Arthur appears either as a great warrior defending Britain from human and supernatural enemies or as a magical figure of folklore, sometimes associated with the Welsh Otherworld, Annwn. How much of Geoffrey's Historia, completed in 1138, was adapted from such earlier sources, rather than invented by Geoffrey himself, is unknown.

Although the themes, events and characters of the Arthurian legend varied widely from text to text, and there is no one canonical version, Geoffrey's version of events often served as the starting point for later stories. Geoffrey depicted Arthur as a king of Britain who defeated the Saxons and established an empire over Britain, Ireland, Iceland, Norway and Gaul.

More information: Biography

Many elements and incidents that are now an integral part of the Arthurian story appear in Geoffrey's Historia, including Arthur's father Uther Pendragon, the wizard Merlin, Arthur's wife Guinevere, the sword Excalibur, Arthur's conception at Tintagel, his final battle against Mordred at Camlann, and final rest in Avalon.

The 12th-century French writer Chrétien de Troyes, who added Lancelot and the Holy Grail to the story, began the genre of Arthurian romance that became a significant strand of medieval literature. 

In these French stories, the narrative focus often shifts from King Arthur himself to other characters, such as various Knights of the Round Table. Arthurian literature thrived during the Middle Ages but waned in the centuries that followed until it experienced a major resurgence in the 19th century. In the 21st century, the legend lives on, not only in literature but also in adaptations for theatre, film, television, comics and other media.

The historical basis for the King Arthur legend has long been debated by scholars. One school of thought, citing entries in the Historia Brittonum, History of the Britons, and Annales Cambriae, Welsh Annals, sees Arthur as a genuine historical figure, a Romano-British leader who fought against the invading Anglo-Saxons some time in the late 5th to early 6th century.

More information: Live Science

The Historia Brittonum, a 9th-century Latin historical compilation attributed in some late manuscripts to a Welsh cleric called Nennius, contains the first datable mention of King Arthur, listing twelve battles that Arthur fought. These culminate in the Battle of Badon, where he is said to have single-handedly killed 960 men. Recent studies, however, question the reliability of the Historia Brittonum.

The other text that seems to support the case for Arthur's historical existence is the 10th-century Annales Cambriae, which also link Arthur with the Battle of Badon. The Annales date this battle to 516–518, and also mention the Battle of Camlann, in which Arthur and Medraut, Mordred, were both killed, dated to 537–539. These details have often been used to bolster confidence in the Historia's account and to confirm that Arthur really did fight at Badon. 

Problems have been identified, however, with using this source to support the Historia Brittonum's account. The latest research shows that the Annales Cambriae was based on a chronicle begun in the late 8th century in Wales. Additionally, the complex textual history of the Annales Cambriae precludes any certainty that the Arthurian annals were added to it even that early. They were more likely added at some point in the 10th century and may never have existed in any earlier set of annals. The Badon entry probably derived from the Historia Brittonum.

The origin of the Welsh name Arthur remains a matter of debate. The most widely accepted etymology derives it from the Roman nomen gentile, family name, Artorius. Artorius itself is of obscure and contested etymology, but possibly of Messapian or Etruscan origin.

More information: BBC

Linguist Stephan Zimmer suggests Artorius possibly had a Celtic origin, being a Latinization of a hypothetical name *Artorījos, in turn derived from an older patronym *Arto-rīg-ios, meaning son of the bear/warrior-king. This patronym is unattested, but the root, *arto-rīg, bear/warrior-king, is the source of the Old Irish personal name Artrí.  

Some scholars have suggested it is relevant to this debate that the legendary King Arthur's name only appears as Arthur or Arturus in early Latin Arthurian texts, never as Artōrius, though Classical Latin Artōrius became Arturius in some Vulgar Latin dialects. However, this may not say anything about the origin of the name Arthur, as Artōrius would regularly become Art(h)ur when borrowed into Welsh. Another commonly proposed derivation of Arthur from Welsh arth bear + (g)wr man, earlier *Arto-uiros in Brittonic, is not accepted by modern scholars for phonological and orthographic reasons.

More information: Caerleon

Notably, a Brittonic compound name *Arto-uiros should produce Old Welsh *Artgur, where u represents the short vowel /u/, and Middle/Modern Welsh *Arthwr, rather than Arthur, where u is a long vowel /ʉː/. In Welsh poetry the name is always spelled Arthur and is exclusively rhymed with words ending in -ur—never words ending in -wr—which confirms that the second element cannot be [g]wr man.

An alternative theory, which has gained only limited acceptance among professional scholars, derives the name Arthur from Arcturus, the brightest star in the constellation Boötes, near Ursa Major or the Great Bear.  

Classical Latin Arcturus would also have become Art(h)ur when borrowed into Welsh, and its brightness and position in the sky led people to regard it as the guardian of the bear, which is the meaning of the name in Ancient Greek, and the leader of the other stars in Boötes.

The popularity of Geoffrey's Historia and its other derivative works, such as Wace's Roman de Brut, is generally agreed to be an important factor in explaining the appearance of significant numbers of new Arthurian works in continental Europe during the 12th and 13th centuries, particularly in France. 

It was not, however, the only Arthurian influence on the developing Matter of Britain. There is clear evidence that Arthur and Arthurian tales were familiar on the Continent before Geoffrey's work became widely known, see for example, the Modena Archivolt, and Celtic names and stories not found in Geoffrey's Historia appear in the Arthurian romances. 

From the perspective of Arthur, perhaps the most significant effect of this great outpouring of new Arthurian story was on the role of the king himself: much of this 12th-century and later Arthurian literature centres less on Arthur himself than on characters such as Lancelot and Guinevere, Percival, Galahad, Gawain, Ywain, and Tristan and Iseult.

More information: History Extra

 

 

I must ride with my knights to defend what was, 
and the dream of what could be.

King Arthur

THE SIEGE PERILOUS, A RESERVED SEAT FOR A HOLY CAUSE

The Siege Perilous

Today, The Grandma wants to remember Italian people who celebrates Ferragosto, a special day for them. In Barcelona, August, 15 is a festivity but without all the importance that it has in Italian lands.

It has been an interesting chapter about the Siege Perilous, a special seat which only can be occupied by a special knight who had accomplished a special and sacred mission. After reading, The Grandma has studied one new lesson of her Intermediate Language Practice manual (Chapter 49).

More information: Spelling and Pronuntiation 1

In Arthurian legend, the Siege Perilous, also known as The Perilous Seat, is a vacant seat at the Round Table reserved by Merlin for the knight who would one day be successful in the quest for the Holy Grail. The English word siege originally meant seat or throne, coming from the Old French sege, modern French siège; the modern military sense of a prolonged assault comes from the conception of an army sitting down before a fortress.

In Thomas Malory's Le Morte d'Arthur, in an account taken from the Vulgate Queste del Saint Graal, the newly knighted Sir Galahad takes the seat in Camelot on Whitsunday, 454 years after the death of Jesus. 

The Siege Perilous

The Siege Perilous is so strictly reserved that it is fatal to anyone else who sits in it. Another version of this story is related in Alfred Tennyson's Idylls of the King.

Originally, this motif about the seat and the grail belonged to Perceval, but the Lancelot-Grail Cycle transferred it to the new Cistercian-based hero Galahad. It appears, for example, in the earlier De Boron Didot Perceval, where Perceval occupies the seat at Arthur's court at Carduel.

According to many scholars, the motif of the dangerous seat can be further traced to Welsh, Cornish, and Breton mythology, where the bulk of the Arthurian legend was derived from. According to this theory, the Siege Perilous was a half-remembered version of a Celtic kingship ritual that has parallels in the Irish Lia Fáil.

The Siege, from the French siège, seat, Perilous is the seat at Arthur’s Round Table in which only the chosen knight can sit. In the prose rendition of Robert de Boron’s Merlin, the empty seat is reminiscent of the seat that Judas vacated.

There is also an empty seat at Joseph of Arimathea’s Grail Table which destroys anyone unworthy of sitting there. In his Continuation to Chrétien’s Perceval, Gerbert de Montreuil says that it was sent to Arthur by the fairy of Roche Menor.

Merlin introduces Galahad to the Round Table

Six knights tried to sit in it and were swallowed by the earth before Perceval sits it in and completes the adventure. When he does, the six are restored to Arthur’s court.

In the thirteenth-century Vulgate Cycle, Merlin instructs Uther to build a table in commemoration of the Grail Table; at the table, there is an empty seat reserved for the Grail knight. 

In the Queste del Saint Graal, the Siege Perilous is said to parallel the seat of Christ at the Last Supper and the seat occupied by Josephus at the Grail Table. Two brothers, jealous of Josephus, objected to his having a special place, and one of them sat in it, only to be destroyed; so it came to be called the Feared Seat. 

Galahad is the knight for whom the Siege Perilous at Arthur’s table is destined. In the Lancelot, a knight named Brumand, trying to perform an act that Lancelot never dared to do, sits in it and is burned to a crisp. Malory says that Merlin made the Siege Perilous for the greatest Grail knight. When Galahad arrives at Camelot, his name appears on the seat destined for him.

More information: King Arthur's Knights

No man could sit but he should lose himself...

Merlin

KING ARTHUR & THE KNIGHTS OF THE ROUND TABLE

King Arthur

Today, Claire Fontaine and The Grandma have left Girona after visiting the sceneries where some episodes of Games of Thrones were filmed. Girona is a wonderful city full of medieval places and Games of Thrones is a successful TV series which that has become a legend in the history of TV.

The Grandma loves Middle Age and she likes medieval legends. One of her favourite is King Arthur and the Knights of the Round Table. Last Sunday, she bought the book in the little market of antiquities in Girona and she wants to share it, to talk about it and to analyze its characters, its myths and its influence since the Middle Age to nowadays.

During her travel to Barcelona, The Grandma has been studying a new lesson of her Intermediate Language Practice manual (Chapter 39).

More information: Phrasal Verbs (I)

Download Phrasal Verbs Manual by The Grandma

King Arthur is a legendary British leader who, according to medieval histories and romances, led the defence of Britain against Saxon invaders in the late 5th and early 6th centuries. The details of Arthur's story are mainly composed of folklore and literary invention, and his historical existence is debated and disputed by modern historians. The sparse historical background of Arthur is gleaned from various sources, including the Annales Cambriae, the Historia Brittonum, and the writings of Gildas. Arthur's name also occurs in early poetic sources such as Y Gododdin.

The legend of King Arthur tapestry

Arthur is a central figure in the legends making up the Matter of Britain.

The legendary Arthur developed as a figure of international interest largely through the popularity of Geoffrey of Monmouth's fanciful and imaginative 12th-century Historia Regum Britanniae, History of the Kings of Britain. In some Welsh and Breton tales and poems that date from before this work, Arthur appears either as a great warrior defending Britain from human and supernatural enemies or as a magical figure of folklore, sometimes associated with the Welsh Otherworld, Annwn. How much of Geoffrey's Historia, completed in 1138, was adapted from such earlier sources, rather than invented by Geoffrey himself, is unknown.

Although the themes, events and characters of the Arthurian legend varied widely from text to text, and there is no one canonical version, Geoffrey's version of events often served as the starting point for later stories. Geoffrey depicted Arthur as a king of Britain who defeated the Saxons and established an empire over Britain, Ireland, Iceland, Norway and Gaul.

More information: Biography

Many elements and incidents that are now an integral part of the Arthurian story appear in Geoffrey's Historia, including Arthur's father Uther Pendragon, the wizard Merlin, Arthur's wife Guinevere, the sword Excalibur, Arthur's conception at Tintagel, his final battle against Mordred at Camlann, and final rest in Avalon.

King Arthur

The 12th-century French writer Chrétien de Troyes, who added Lancelot and the Holy Grail to the story, began the genre of Arthurian romance that became a significant strand of medieval literature. 

In these French stories, the narrative focus often shifts from King Arthur himself to other characters, such as various Knights of the Round Table. Arthurian literature thrived during the Middle Ages but waned in the centuries that followed until it experienced a major resurgence in the 19th century. In the 21st century, the legend lives on, not only in literature but also in adaptations for theatre, film, television, comics and other media.

The historical basis for the King Arthur legend has long been debated by scholars. One school of thought, citing entries in the Historia Brittonum, History of the Britons, and Annales Cambriae, Welsh Annals, sees Arthur as a genuine historical figure, a Romano-British leader who fought against the invading Anglo-Saxons some time in the late 5th to early 6th century.

More information: Live Science

The Historia Brittonum, a 9th-century Latin historical compilation attributed in some late manuscripts to a Welsh cleric called Nennius, contains the first datable mention of King Arthur, listing twelve battles that Arthur fought. These culminate in the Battle of Badon, where he is said to have single-handedly killed 960 men. Recent studies, however, question the reliability of the Historia Brittonum.

Stephen Colbourn's version

The other text that seems to support the case for Arthur's historical existence is the 10th-century Annales Cambriae, which also link Arthur with the Battle of Badon. The Annales date this battle to 516–518, and also mention the Battle of Camlann, in which Arthur and Medraut, Mordred, were both killed, dated to 537–539. These details have often been used to bolster confidence in the Historia's account and to confirm that Arthur really did fight at Badon. 

Problems have been identified, however, with using this source to support the Historia Brittonum's account. The latest research shows that the Annales Cambriae was based on a chronicle begun in the late 8th century in Wales. Additionally, the complex textual history of the Annales Cambriae precludes any certainty that the Arthurian annals were added to it even that early. They were more likely added at some point in the 10th century and may never have existed in any earlier set of annals. The Badon entry probably derived from the Historia Brittonum.

The origin of the Welsh name Arthur remains a matter of debate. The most widely accepted etymology derives it from the Roman nomen gentile, family name, Artorius. Artorius itself is of obscure and contested etymology, but possibly of Messapian or Etruscan origin.

More information: BBC

Linguist Stephan Zimmer suggests Artorius possibly had a Celtic origin, being a Latinization of a hypothetical name *Artorījos, in turn derived from an older patronym *Arto-rīg-ios, meaning son of the bear/warrior-king. This patronym is unattested, but the root, *arto-rīg, bear/warrior-king, is the source of the Old Irish personal name Artrí.  

King Arthur

Some scholars have suggested it is relevant to this debate that the legendary King Arthur's name only appears as Arthur or Arturus in early Latin Arthurian texts, never as Artōrius, though Classical Latin Artōrius became Arturius in some Vulgar Latin dialects. However, this may not say anything about the origin of the name Arthur, as Artōrius would regularly become Art(h)ur when borrowed into Welsh. Another commonly proposed derivation of Arthur from Welsh arth bear + (g)wr man, earlier *Arto-uiros in Brittonic, is not accepted by modern scholars for phonological and orthographic reasons.

More information: Caerleon

Notably, a Brittonic compound name *Arto-uiros should produce Old Welsh *Artgur, where u represents the short vowel /u/, and Middle/Modern Welsh *Arthwr, rather than Arthur, where u is a long vowel /ʉː/. In Welsh poetry the name is always spelled Arthur and is exclusively rhymed with words ending in -ur—never words ending in -wr—which confirms that the second element cannot be [g]wr man.

An alternative theory, which has gained only limited acceptance among professional scholars, derives the name Arthur from Arcturus, the brightest star in the constellation Boötes, near Ursa Major or the Great Bear.  

The Archbishop presents the sword to Arthur

Classical Latin Arcturus would also have become Art(h)ur when borrowed into Welsh, and its brightness and position in the sky led people to regard it as the guardian of the bear, which is the meaning of the name in Ancient Greek, and the leader of the other stars in Boötes.

The popularity of Geoffrey's Historia and its other derivative works, such as Wace's Roman de Brut, is generally agreed to be an important factor in explaining the appearance of significant numbers of new Arthurian works in continental Europe during the 12th and 13th centuries, particularly in France. 

It was not, however, the only Arthurian influence on the developing Matter of Britain. There is clear evidence that Arthur and Arthurian tales were familiar on the Continent before Geoffrey's work became widely known, see for example, the Modena Archivolt, and Celtic names and stories not found in Geoffrey's Historia appear in the Arthurian romances. 

From the perspective of Arthur, perhaps the most significant effect of this great outpouring of new Arthurian story was on the role of the king himself: much of this 12th-century and later Arthurian literature centres less on Arthur himself than on characters such as Lancelot and Guinevere, Percival, Galahad, Gawain, Ywain, and Tristan and Iseult.

More information: History Extra

I must ride with my knights to defend what was, 
and the dream of what could be.

King Arthur