Arawn

Amaethon stole a dog, lapwing and roebuck[?] from Arawn, leading to the Cath Godeau[?], which Arawn lost to Amaethon and his brother, Gwydion.

In the Mabinogion, Arawn forced Pwyll to trade places with him for a year and a day as punishment for having set his own dogs against Arawn's pack, while Arawn took Pwyll's place at his palace in Dyfed. Pwyll defeated Hafgan, Arawn's rival, at the end of this time, who could only be killed by a mortal. Arawn and Pwyll became good friends because Pwyll did not sleep with Arawn's wife.