Anglicized form of Irish Éirinn. Erin has been used as a poetic name for Ireland for centuries, and in recent years this has become a popular given name in the English-speaking world, even among people with no Irish connections.
English and Welsh: patronymic from the Middle English personal name Jon(e) (see John). The surname is especially common in Wales and southern central England. In North America this name has absorbed various cognate and like-sounding surnames from other languages. (For forms, see Hanks and Hodges 1988).