Son of Rhea and Cronus, brother of Zeus, Hera, Hestia, Demeter, and Poseidon.
Poseidon is the brother of Zeus and Hades, his sisters include Hera, Demeter and Hestia. Their mother is Rhea and father Cronus.
Ruler of the Underworld, it's deities and the ghosts of the dead.
He was the ruler of the Underworld and the deities within and the ghosts of the dead.
Busy ruling the dead and the deities who live in the Underworld along with him.
Hades' grandparents are Uranus and Gaia in Greek mythology. Uranus is the personification of the sky, while Gaia represents the Earth. They are the primordial deities from whom the Titans, including Hades' father Cronus, are descended.
Hades did not do anything 'bad', he was the king of the Underworld and it's deities were dark if not deadly by nature. The only myth that centers him as a 'villain' is that of Persephone's kidnapping.
Hera is the Queen of the Gods, wife of Zeus; who is her brother, her other brothers include Hades and Poseidon and her sisters include Demeter and Hestia. She is the mother of Ares, Eris, Hebe, Hephaestus, and Eileithyia.
Hades does have the ability to punish the souls of the departed if he sees fit.
His brothers Zeus and Poseidon; his wife Persephone, as well as the deities of the Underworld such as the Dream gods and the Furies.
It depended upon the interpretation of the writer and what they know of the myths; Greek deities were spoken of, they did not speak.
The Roman religion of the time was a loose brand of polytheism. Many major deities were worshiped, along with minor deities that all might not participate in worshiping. Major deities included Zeus, Poseidon, and Hades.
No one knows. Greek myth gives no birth dates for the Greek deities.