[2] In the Second Branch of the Mabinogi, Branwen ferch Llyr, Britain is ruled by the giant Bran the Blessed, who has never been able to fit inside any dwelling.
Also in the Second Branch, the Pair Dadeni (Cauldron of Rebirth) is brought to Wales from Ireland by the giant Llassar Llaes Gyfnewid and his wife, Cymidei Cymeinfoll.
Ysbaddaden, chief of giants, is the father of Olwen, a beautiful maiden sought by Culhwch fab Cilydd, a cousin of King Arthur's.
Sometime later, as Arthur "washed his hands after slaying the red-eyed giant of Cernyw", he received a message from Rhitta, demanding his beard to patch his cloak.
The Historia Brittonum claims that Benlli Gawr was an early king of Powys, who was burned to death after acting aggressively towards Germanus of Auxerre.
Canthrig Bwt, a giantess and witch notorious in the folklore of Gwynedd, lived under a great stone in Nant Peris and killed and ate a number of the community's children.
A tale tells of the imprisonment of a number of his sons by the giants of Bron Wrgan, leading to Arthur's attack on the abode to free his brothers-in-law.