Engres

King of Ireland and brother of Isolde in the Icelandic Saga af Tristram ok Ísodd. Though his name is similar to the Anguish of other Tristan (Tristram) stories, part of his character seems to be based on the traditional Morholt. His mother was Queen Flúrent.

Engres was a pirate who often raided King Mark’s England. Tristan slew him in battle, but not before Engres left a piece of his sword stuck in Tristan’s head, which later identified Tristan to Engres’s mother and sister.

He offered his sister's hand to whomsoever would kill a dragon.