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Thalassa
Nyx
The personification of the pure upper air in which the gods reside, in contrary to the 'aer', the lower air which mortals breathe. In the early Greek cosmologies, Aether is the son of Erebus and Nyx, and the brother of Hemera. He is one of the elements of the cosmos and in the Orphic hymns he is mentioned as the soul of the world from which all life emanates.
Metis (moon of Jupiter) was a daughter of Tethys and Oceanus.
Frank Zappa named his daughter Moon Unit. 'Unit' is her middle name, the name she goes by is Moon Zappa.
Thalassa
Thalassa.
Hemera (Day) has two daughters with Aither (Light); Gaia (Earth) and Thalassa (Sea).
Thalassa.
Nyx
Gaia (Earth) and/or Thalassa (Sea).
Nyx
No; Hemera is the primeval goddess of the day; daughter of Nyx and Erebus and mate of Aither. Gaea is her daughter; Rhea is the daughter of Gaea and mother of Hera. Hemera is then the great-grandmother of Hera.
Thanatos's mother was Nyx, her mother was Chaos; who either had no other daughter or whose other daughter was Hemera (when Hemera was not the daughter of Nyx).
Hemera (Day) was the mother of Thalassa (Sea) and Gaia (Earth) by Aither (Light).
Aether and Gaia had a daughter, Aergia, a goddess of sloth and laziness. A link can be found below for more information.
Hemera, daughter of Nyx and Erebus