Ubara-Tutu
Ubara-tutu of Shuruppak was the last antediluvian king of Sumer. He was said to have reigned for 18,600 years. He was the son of En-men-dur-ana, a Sumerian mythological figure often compared to Enoch, as he entered heaven without dying. Ubara-Tutu was the king of Sumer until a flood swept over his land, like Emperor Yao and Methuselah.
After the deluge, the kingship was reestablished in the northern city of Kish, according to the Sumerian king list.
Ubara-tutu is briefly mentioned in tablet XI of the Epic of Gilgamesh. He is identified as the father of Utnapishtim, a character who is instructed by the god Ea to build a boat in order to survive the coming flood.
