What are facts about Hades' family?

According to Greek mythology, Hades was the son of Rhea and Kronos, the brother of Zeus and Poseidon and the husband of Persephone. He had no children.

According to the Percy Jackson book "The Titan's Curse", Hades had two children both of whom the author fabricated to tie in to the story line. There names were Nico and Bianca di Angelo.