abstract:Pwyll Pen Annwn is a prominent figure in Welsh mythology and literature, the lord of Dyfed, husband of Rhiannon and father of the hero Pryderi. He is the eponymous hero of Pwyll Pendefig Dyfed, the first branch of the Four Branches of the Mabinogi, and also appears briefly as a member of Arthur's court in the medieval tale Culhwch ac Olwen.