Who is hebe siblings?

Hebe, the Greek goddess was the daughter of Hera and Zeus, so I will list those children, though you should be aware that Zeus had many children by mortal and immortal women other then Hera.

Ares: God of War and men

Hephaestus: god of fire, metalworking, stonemasonry and the art of sculpture.

Typhaon: a monstrous immortal storm-giant