A cousin of Lancelot in La Tavola Ritonda.
With other knights of his family, he attended a tournament in Ireland sponsored by King Anguish. He was poisoned or otherwise slain during the tournament in a mysterious manner, and his kinsmen blamed Anguish. The king was challenged to judicial combat by Brunoro. Anguish enlisted Tristan to fight as his champion and was exonerated.
Maragins’ story appears in both the Prose Tristan and Malory’s Le Morte Darthur, but his character is unnamed.
Source
La Tavola Ritonda | 1325–1350