Bran ("Raven") Vendigeit (~"Blessed")* was the son of Llŷr and Penardun, Beli's daughter (which complicates things if Llŷr was Beli's son!: see Llŷr). He features (as Bendigeid Vran) in the Welsh "Mabinogion" tale Branwen as a giant hero with a zombie-making cauldron, who's head was buried at White Mount (Tower Hill?) in London to protect the nation.

Bran is almost certainly the Fisher King "Bron" of later Grail Romances*, so gloriously over-signified in From Ritual to Romance by Jessie Weston*.