Irish: reduced Anglicized form of Gaelic Ó Longáin 'descendant of Longán', a personal name probably derived from long 'tall', or perhaps from the homonymous long 'ship' (and so originally a byname for a seafarer).

What nationality is surname Langan?

The name Langan is a contraction and Anglicisation of the Irish (Gaelic) name, Ó Longáin, meaning grandson (or descendant) of Longáin. Longáin is thought to mean long or tall.

Where does the last name Langen come from?

The name langen is derived from the Old German word "lang," which means "long," and it was a nickname for a very tall person.