The last name 'Andersen' is Scandinavian. It can be of either Norwegian or Danish origin, but not Swedish as the parallel name in Swedish would be 'Andersson'. If we are talking about US citizens then there is approx. twice as big likelihood of Norwegian ancestry compared to Danish as there were 2,25 times as many Norwegian immigrating to the US.
Armenia
England.
India
FRANCE
canada
Portugal
Armenia
France
England
Gale
Italy, From Julius.
Probably Spain.