Tristan’s squire, whose name was changed from Alcardo when Tristan knighted him. He was Isolde’s cousin. He accompanied Tristan on his adventures in Logres. He was slain when King Mark of Cornwall besieged the castle of Joyous Guard to reclaim Isolde from Tristan.

The brother of Iseult, though this is a later name for Alcardo. Under the name of Lantris, Alcardo is said to have been a squire, possibly to Tristan, and was killed in his attempt to rescue his sister from King Mark.