For 10 points, name this Celtic deity, a god of the sea with strong ties to the Isle of Man, the son of another sea god named Lir.
This figure carried around a silver branch of apples while disguised as a young boy in his role as guardian of Emhain Abhlach, and it is said that either he or Tethra rules over Mag Mell. He once gave a goblet that breaks when three lies are spoken over it and restores itself with the speaking of three truths to Cormac mac Airt, and his other possessions include a cloak made of mists that he used to keep his wife and a hero from ever meeting each other again. One of his daughters owned the horse Embarr, and he was the first owner of the sword Fragarach. He and Finn McCool are both grandfathers of Plor na mBan because the bard Oisin married this god's daughter Niamh, and his wife, Fand, had a brief affair with Cuchulainn. More famously, he's the foster father of the son of Ethniu that defeated Balor during the second Battle of Magh Tuireadh, Lugh of the Long Arm. For 10 points, name this Celtic deity, a god of the sea with strong ties to the Isle of Man, the son of another sea god named Lir.
This figure carried around a silver branch of apples while disguised as a young boy in his role as guardian of Emhain Abhlach, and it is said that either he or Tethra rules over Mag Mell.
{Manannan} mac Lir [accept {Barinthus}]