Short form of Montgomery or of the much rarer Montague and Montmorency. It is now also found as an independent given name. As a Jewish name, it was originally used as an approximate English equivalent of Moses.
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).