From Latin Christianus ‘follower of Christ’, in use as a given name from the Middle Ages onwards, especially as a girl's name. The name of Christ (Greek Khristos) is a translation of the Hebrew term Messiah ‘anointed’.
English and Scottish: patronymic from the personal name John. As an American family name, Johnson has absorbed patronymics and many other derivatives of this name in continental European languages. (For forms, see Hanks and Hodges 1988.)