Scandinavian
This last name was originally a typical Scandinavian Patronymic: http://wiki.geni.com/index.php/Patronymics For Scandinavian families it was only introduced as a last name or family name around 1850-1900. Emil Karlsson came to American in 1922 thru Elis Islaand and his naame was chaged at that time to Carlson. He became a citizen on Nov 20 1939 and the name was changed by order of the court at that time.