The name is a tautology, consisting of the word "loch" (of Gaelic origin) and vatn, a Norse word meaning the very same, found in such names as "Þingvallavatn" and Myvatn in Iceland, and "Røssvatnet" and "Møsvatn" in Norway.
Loch Lomond | Loch Ness Monster | Loch Ness | Watten, Nord | Watten | Barrett Watten | Loch Fyne | loch | Loch Ryan | Loch Ness monster | Loch Long | Loch Linnhe | Holy Loch | Henry Loch, 1st Baron Loch | Loch Ness Monster (roller coaster) | Loch Lubnaig | Loch Lomond (band) | Loch Eck | Loch Crinan | Loch Arkaig | Wave Loch | The Loch | The Bonnie Banks o' Loch Lomond | Nor' Loch | New Farm Loch | Loch Tay | Loch Ness Monster in popular culture | Loch Leven, Newfoundland and Labrador | Loch Ken | Loch Katrine |