Last name 里森 (Reason 
, Riesen 
, 里森 
) , all around the world, is a common family name. The family name 里森 is characteristic of Liechtenstein, where it is quite a common surname, Switzerland, and Jersey. In absolute terms, it most frequently occurs in the United States, Switzerland, and the United Kingdom. Likewise, 里森 is the forename as well as the last name.