Ler (meaning "Sea" in Old Irish; Lir is the genitive form) is a sea god in Irish mythology. His name suggests that he is a personification of the sea, rather than a distinct deity. He is named Allód in early genealogies, and corresponds to the Llyr of Welsh mythology. Ler is chiefly an ancestor figure, and is the father of the god Manannán mac Lir, who appears frequently in medieval Irish literature. Ler appears as the titular king in the tale The Children of Lir.