In Sumerian mythology, the flood survivor who preserves humanity is Ziusudra.
Ziusudra is the central human figure in the Sumerian flood story, preserved on a fragmentary tablet from the early second millennium BCE. The gods decide to destroy humankind with a flood, but the god Enki warns Ziusudra and instructs him to build a large boat.
Ziusudra survives the catastrophe and is granted an exceptional, enduring life. His story is an early Mesopotamian form of the flood tradition that later appears in Akkadian literature under different names.
Atrahasis is the hero of another Akkadian flood narrative, while Utnapishtim is the name used for the flood survivor in the Epic of Gilgamesh. These figures are closely related in tradition, but Ziusudra is the specifically Sumerian name.