Family name Guelpen (Guelpen 
) , in all the world, is a rare last name. The last name Guelpen is characteristic of Germany, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Guelpen | Germany, United States |
| bethany van guelpen researcher (b. 1979) |
|