Little is known about Onchestos and only two literary sources (
Plutarch in
Quaestiones Graecae and
Pausanias in
Description of Greece) gave information about him. In these accounts, he was described as the Boeotian son of
Poseidon and father of
Megareus and
Abrota, wife of King
Nisos. Onchestus's son and son-in-law were listed as kings of
Megara. In some traditions, Onchestus was called the son of
Boeotus. == Mythology ==