Last name 希森 (Hysen 
, Xisen 
, 希森 ) , around the world, is quite a rare surname. The last name 希森 is characteristic of Albania, where it is quite a rare surname, Slovenia, where it is a rare surname, and Canada. Measured by absolute frequency, the name is most common in the United States, China, and Canada. More frequently, 希森 is the forename as well as the last name.