Mannanan mac Lir

From AoCWiki

Mannanan mac Lir was an ancient ocean. He was the son of ("mac") another ocean god, Lir. Mannanan lived on an island that was known by the three names Mag Mell ("plain of honey"), Tir Tairngiri ("land of promise"), and Emain Ablach ("island of apples"). He was also a skilled shape-shifter.