In Welsh mythology, Arawn (Welsh pronunciation: [ˈarau̯n]) was the king of the otherworld realm of Annwn who appears prominently in the first branch of the Mabinogi, and alluded to in the fourth. In later tradition, the role of the king of Annwn was largely attributed to the Welsh psychopomp, Gwyn ap Nudd - meaning "white" (i.e. 'winter') a possible kenning for his true name. However, Arawn's memory is retained in a traditional saying found in an old Cardigan folktale:
The name Arawn is derived from that of the biblical prophet Aaron.