Cognomen Riisøen (Riisøen 
) , in all the world, is a very rare last name. The cognomen Riisøen is habitual in Northern Europe, particularly Norway, where it is a rare surname.
| sverre riisøen Norwegian journalist and priest, NL (b. 1906) |
|
|
| helge riisøen Norwegian physician (b. 1951) |
|