SiTU Basics: MESOPOTAMIAN DEITIES
The Anunnaki (also transcribed as: Anunna, Anunnaku, Ananaki and other variations) are a group of deities in ancient Mesopotamian cultures (i.e., Sumerian, Akkadian, Assyrian and Babylonian). The name is variously written "da-nuna", "da-nuna-ke4-ne", or "da-nun-na", meaning something to the effect of "those of royal blood" or 'princely offspring'. Their relation to the group of gods known as the Igigi is unclear — at times the names are used synonymously but in the Atra-Hasis flood myth the Igigi are the sixth generation of the Gods who have to work for the Anunnaki, rebelling after 40 days and replaced by the creation of humans.
According to later Assyrian and Babylonian myth, the Anunnaki were the children of Anu and Ki, brother and sister gods, themselves the children of Anshar and Kishar (Skypivot and Earthpivot, the Celestial poles), who in turn were the children of Lahamu and Lahmu ("the muddy ones"), names given to the gatekeepers of the Abzu temple at Eridu, the site at which the creation was thought to have occurred. Finally, Lahamu and Lahmu were the children of Tiamat (Goddess of the Ocean) and Abzu (God of Fresh Water).
TIAMAT vs. MARDUK