Lauchlan is a Scottish given name and surname, serving as a variant of Lachlan. The name ultimately traces back to the Old Irish Lochlainn, which means "Viking, Scandinavian" and originally referred to Scandinavia as "land of the lakes" (from loch "lake"). Thus, Lauchlan carries the historical connotation of Norse or Viking heritage, reflecting early Gaelic descriptions of Scandinavian raiders and settlers.