He was a giant and king of Britain in the Welsh Mabinogion. The son of Llyr and Penarddun, and brother of Branwen, Efnisien, and Manawydan. He was mortally wounded in battle and ordered that his head should be cut off. According to the Triads, his head was buried in London where the White Tower now stands. As long as it remained there, Britain would be safe from invasion. However, King Arthur dug up the head, declaring the country would be protected only by his great strength. There have been attempts to link the still-current practice of keeping ravens at the Tower of London with this story of Bran, whose name means Raven