All around the world, 里森 (Reason 
, Riesen 
, 里森 
) is quite a rare predominantly masculine, but scarcely female first name. The first name 里森 is characteristic of Mongolia, where it is quite a rare male name, South Africa, where it is quite a rare largely boy's, but seldom feminine name, and Qatar, where it is a rare boy's name. In absolute terms, the name is most common in South Africa, Nepal, and China. Likewise, 里森 is the last name as well as the forename.