Annunaki
The Anunnaki (also transcribed as: Anunaki, Anunna, Anunnaku (singular), Ananaki, and other variations) are a group of deities in ancient Mesopotamian cultures (e.g. Sumerian, Akkadian, Assyrian, and Babylonian).
The name is variously written "da-nuna", "da-nuna-ke4-ne", or "da-nun-na", meaning "princely offspring" or "offspring of Anu". According to The Oxford Companion to World Mythology, the Anunnaki: "...are the Sumerian deities of the old primordial line; they are chthonic deities of fertility, associated eventually with the underworld, where they became judges. They take their name from the old sky god An (Anu)."
By her consort Anu, Ki gave birth to the Anunnaki, the most prominent of these deities being Enlil, god of the air. According to legends, heaven and earth were once inseparable until Enlil was born; Enlil cleaved heaven and earth in two. Anu carried away heaven. Ki, in company with Enlil, took the earth.
Some authorities question whether Ki was regarded as a deity since there is no evidence of a cult and the name appears only in a limited number of Sumerian creation texts. Samuel Noah Kramer identifies Ki with the Sumerian mother goddess Ninhursag, and claims that they were originally the same figure.
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.
Jeremy Black and Anthony Green offer a slightly different perspective on the Igigi and the Anunnaki, writing that "lgigu or Igigi is a term introduced in the Old Babylonian Period as a name for the (ten) 'great gods'. While it sometimes kept that sense in later periods, from Middle Assyrian and Babylonian times on it is generally used to refer to the gods of heaven collectively, just as the term Anunnakku (Anuna) was later used to refer to the gods of the underworld. In the Epic of Creation, it is said that there are 300 lgigu of heaven."
...
Wikipedia