Manannan Mac Lir is the son of Lir and a major god of the sea. Some of his children are Aodh the Red and Aine the Faery Queen of Munster.
Manannan Mac Lir tried to become king twice; first when the gods lived in the four cities and Nuadha was elected. Second was when the Milesians conquered Ireland. Manannan appeared to hold a grudge against Bobd Dearg.
He is also the foster-father of Lugh Lamhfada, even lending Lugh Lamhfada his sword Fragarach, the Answerer.
Manannan is also a skilled enchanter as he was able to hide the Tuatha De Danann's houses after the Milesians conquered them.