Named after the River Ness, of Celtic/Pictish origin, from a Proto-Celtic word *Nesta describing great currents, according to MacBain, from the same Proto-Indo-European root that gave the river Νέστος (Néstos), possibly *ned- (“water”).
- (Irish mythology) An Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa.
- The River Ness, a short river in Highland council area, Scotland, which flows from Loch Ness through Inverness to the Beauly Firth.
- A surname.
- ^ ^MacBain, Alexander (1922). Place names Highlands & Islands of Scotland. p. 146.