Galehaut (or Galaha[l/u]t, Galeho[l]t, Gallehau[l]t, Galhault, Galetto, et al.) is a half-giant knight and sovereign prince in Arthurian legend.
Galehaut, a half-blood giant lord of the Distant Isles (le sire des Isles Lointaines),[1] appears for the first time in the Matter of Britain in the "Book of Galehaut" section of the early 13th-century Prose Lancelot Proper, the central work in the series of anonymous Old French prose romances collectively known as Lancelot-Grail (the Vulgate Cycle).
Though unknown to Arthur and his court, Galehaut, having set out as a young knight to conquer the entire world, has already subjugated thirty lands such as his favourite kingdom of Sorelois and acquired tremendous military power, loyal vassals, and a reputation for personal valor and noble character.
Lancelot, at the end of his own life, is buried next to Galehaut at his castle of Joyous Gard in the tomb that he had built to consecrate and eternalise their companionship.
Since the early 13th century, there have been numerous retellings of the life, loves and chivalry of Lancelot's career and the story of his adulterous liaison with Queen Guinevere has always been part of every significant account of King Arthur.
In Italian romance Tristano Riccardiano, Galehaut dies of his wounds following a duel with Tristan in an attempt to avenge the slaying of his parents, forgiving him in the end.
Galahad is the "pure", the "chosen" knight who achieves the quest for the Holy Grail in a part of the Arthurian legend quite distinct from the story in which Galehaut appears.