User blog comment:Princess3911/Greek Mythology/@comment-5240955-20151106001404

Medusa and Poseidon aren't related, and I think if Poseidon was Deuce's dad that'd be mentioned. As for Posea, she's probably half monster. Don't know what kind but if Amphirite his her mother then she'd be half nymph.

Hades, Athena, etc aren't really monsters, but anything can happen. There is also EAH, which has the adoptde daughter of Eros.