Cognomen Drehn (Drehn 
) , in the entire world, is a very rare family name. The surname Drehn is habitual in Denmark, where it is a rare surname, Norway, and Germany, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Drehn | United States, Denmark, Germany, Norway |
| johann drehn DE (b. 1596) |
|