the origin of the last name Andersons. Patronymic surname meaning "son of Andrew." Andrew (man, manly) was the first of Jesus' disciples, and was a revered name in medieval times due to its church connections. St. Andrew is the patron saint of both Scotland and Russia.
Swedish patronymic "son" names traditionally end in -son, not -sen. In Denmark the regular patronymic is -sen. In Norway, both are used, although -sen is more common. Icelandic names traditionally end in -son or -dotir.