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Enmerkar
Enmerkar ( ) is a legendary king listed as the builder of the Sumerian city of Uruk. He was said to have reigned for "420 years"; some copies read "900 years".
The king list adds that Enmerkar became king after his father Mesh-ki-ang-gasher, son of Utu, had "entered the sea and disappeared." 
Enmerkar is also known from a few other Sumerian legends, most notably "Enmerkar and the Lord of Aratta", where a previous confusion
Enmerkar and En-suhgir-ana
Enmerkar and En-suhgir-ana (also known as Enmerkar and Ensuhkeshdanna) is text in Sumerian literature appearing as a sequel to "Enmerkar and the Lord of Aratta", and is second in a series of four accounts describing the contests of Aratta against Enmerkar, lord of Unug and Kulaba, and his successor Lugalbanda, father of Gilgamesh.
Synopsis.
The name of the Lord of Aratta, which never appeared in "Enmerkar and the Lord of Aratta", is