Hecatoncheires means "hundred handed". They were gigantic and had fifty heads and one hundred arms each of great strength. There were three of them: Briareus also called Aegaeon, Cottus, and Gyges also called Gyes. They were born to Gaea and Uranus.
Hecatoncheires
In Greek mythology, the Hecatoncheires, Hekatoncheires, or Hundred-Handers, also called the Centimanes were three monstrous giants, of enormous size and strength, each with fifty heads and one hundred arms. They were individually named Cottus,... Wikipedia