Wikipedia
Alulim was both the first king of Eridu and the first king of Sumer (according to the mythological antediluvian section of the Sumerian King List.) Enki (the god of Eridu) is said to have brought civilization to Sumer at this point, or just shortly before.
The Sumerian King List has the following entry for Alulim:
In a chart of antediluvian generations in Babylonian and Biblical traditions, Professor William Wolfgang Hallo associates Alulim with the composite half-man, half-fish counselor or culture hero ( Apkallu) Uanna-Adapa (Oannes), and suggests an equivalence between Alulim and Enosh in the Sethite genealogy given in Genesis chapter 5. Hallo notes that Alulim's name means, “ Stag”. William H. Shea suggests that Alulim was a contemporary of the biblical figure Adam, who may have been derived from Adapa of ancient Mesopotamian religion.