Of uncertain origin.
- (5th BC Attic): IPA: /ɔ͜ɔke.anós/
- (1st BC Egyptian): IPA: /oːkɛanós/
- (4th AD Koine): IPA: /okeanós/
- (10th AD Byzantine): IPA: /oceanós/
- (15th AD Constantinopolitan): IPA: /oceanós/
- Oceanus, son of Uranus & Gaia; the primary Greek water deity.
- The great river, which encompasses the world disc.
- The great Outward Sea, as opposed to the inner sea (Mediterranean Sea)
- Ὠκεανίς (Okeanis)