Wikipedia
Heleus
In Greek mythology, Heleus or Heleius , also Helius , was the youngest son of Perseus and Andromeda.
Heleus was brother of Perses, Alcaeus, Sthenelus, Electryon, Mestor, Cynurus, Gorgophone and Autochthe. He accompanied his nephew Amphitryon on the expedition to Taphos, and after the victory shared the sovereignty of their domain with Cephalus.
A town Helos in Laconia was said to have been founded by and named after him.