The name Linn is of Celtic origin. The meaning of the name evolved from "a depression containing water" to "the wild, precipitous, cavernous heights surrounding" waterfalls. [Source: George Wilds Linn, A History of a Fragment of the clan Linn]

The Linns are descendants of the original inhabitants of England, the Celts, and their descendants the Druids and the Picts. From the Scottish Highlands (Dalry, Ayrshire, Scotland), David Lynn and John Lynn emigrated to county Tyrone, Ulster, Ireland in 1616.