Thordsen

Thordsen is a surname. Notable people with the surname include:
 * Harold Thordsen (1907–1999), American politician, police officer, and football player, brother of Kelly
 * Jakob Thordsen (born 1999), German sprint canoeist
 * Jimmy Thordsen (born 1948), Puerto Rican Olympic baseball player
 * Kelly Thordsen (1917–1978), American actor, brother of Harold
 * William George Thordsen (1879–1932), United States Navy sailor awarded the Medal of Honor