Ziusudra, the name of the Sumerian global flood hero, meant days-serpent (tiwaz hydra) among the indo european (japhetic) speakers, his name known in Sumer no sooner than the 17th century b. c., so apparently Aryans from the Hindu Kush and Pamir regions gained sway in ice age Sumer, their name for the flood hero adopted by the kushitic Sumerians.
