Alan is a masculine given name in the English language. [2] The name is believed by scholars to have been brought to England by people from Brittany, in the 11th century; later the name spread north into Scotland and west into Ireland. [3] In Ireland and Scotland there are Gaelic forms of the name which may, or may not, be etymologically related to the name introduced by the Bretons.
https://en.wikipedia.org/wiki/Alan_(given_name)

