Children of Tartarus

Typhon, Echidna, Alcyoneus, Damysos, Ephialtes, Leon, Peloreus, Porphyrion, Theodamas, and Aristaios< Enceladus, Pallas, Polybotes, Gration, Eurytus, Agrios and Thoon, Mimas, and Clytius

P.S.---> Heracles had the the most kills of the Gigantomachy the first time they fought the giants.

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The giants can be the children of gaia and fertilized par the blood of Ouranos ou their father is the spirit of tarturus i didnt know for sure so i gave toi all of em

In Roman Myth's No it was a place that the bad people go to after death for eternal punishment and in Greek Myth's Yes and No. The Giants were children of tartarus and Gaia some say, but others say Ouranus and Gaia so yea there's my answer

Typhon and possibly Echidna and the Giants.