What is cerberus's family called?

Cerberus is part of the family of mythological creatures known as "chthonic beings," which are associated with the underworld in Greek mythology. He is specifically a three-headed dog that guards the gates of Hades, preventing the dead from leaving. In a broader context, Cerberus belongs to the lineage of monstrous offspring of the primordial beings Gaia (Earth) and Tartarus (the abyss). His siblings include other formidable creatures like the Hydra and the Chimera.