The death of this man's son at the hands of Caswallawn fab Beli leads  to him being one of the "three who broke their hearts with grief."
The death of this man's son at the hands of Caswallawn fab Beli leads  to him being one of the "three who broke their hearts with grief." He is  the first to have spoken the proverb "Let him who is a chief be a bridge."  One of this man's half-brothers squeezes the brains of one hundred men  who are hiding in sacks of flour. That was done after his sister passed a  message to him via a starling. This father of Caradawg was closely  advised by (*) by the roguish Evnisien. He travelled to defeat a man that  possessed a cauldron which could mutely revive the dead, Matholwich. For 10  points, name this giant whose head is buried under the white hill underneath  the tower of London.
The death of this man's son at the hands of Caswallawn fab Beli leads  to him being one of the "three who broke their hearts with grief."
Bran the Blessed