From Scottish Gaelic Lachlann, Lochlann (“land of the lochs, loch or fjord land, i.e. Scandinavia”), said to refer to an immigrant from Norway, a Norseman.
* As a Scottish Gaelic and Irish surname, from Donnchadh, a name composed of donn (“brown”) + cath (“battle”). Also spelled as Donagh and Donaghue, Donahue.
* Also as an Irish…
From Scottish Gaelic Lachlann, Lochlann (“land of the lochs, loch or fjord land, i.e. Scandinavia”), said to refer to an immigrant from Norway, a Norseman.