Around the world, Riesen (Riesen 
, 里森 
) is a rare mostly male, but infrequently female first name. The given name Riesen is habitual in Philippines, where it is a very rare epicene name, and China, where it is an extremely rare masculine name. More prevalently, Riesen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Riesen | United States, Switzerland, France, Germany, Netherlands |
| 里森 | China |