Nimrod (Hebrew: נמרוד, Nimrōḏ; Greek: Νεβρωδ, Nebrōḏ; Arabic: نمرود, Nimrūḏ; meaning rebellion is described in Genesis 10:8-12 as a great hunter, warrior, and leader, who founded several cities in Mesopotamia, including Babylon, Uruk, Akkad, Kalneh, in the land Shinar and Nineveh, Rehoboth-Ir, Calah and Resen ("between Nineveh and Calah").
Genesis 10:6-8 tells us that Ham's son Cush sons included Seba, Havilah, Sabtah, Raamah, and Sabteca, Raamah (father to Sheba and Dedan) and Nimrod.
All of the sons listed in verse 6 settled in Africa, while Nimrod's kingdom is clearly in Mesopotamia. Raamah's territory might be in Arabia and his two sons were Dedan and Sheba. Nimrod's territory was in the Tigris-Euphrates region. The most likely explanation is that Nimrod was indeed a son of Cush, however, due to some quarrel, he became estranged. This estrangement also could explain Nimrod's exclusion from Genesis 10:6.
Some scholars have speculated that Nimrod was the Hebrew name for Sargon I of Akkad, a leader who came from western lands to establish a kingdom in Mesopotamia. However, Sargon is generally considered to be a Semite (a descendant of Shem), not a descendant of Ham via Cush, as Nimrod seems to be.
Others have suggested like David Rohl have suggested Enmerkar, others have also suggested Dumuzid, Gilgamesh and Marduk.