Last name Koehn-Mace (Koehn-Mace 
) , worldwide, is an extremely rare cognomen. The surname Koehn-Mace is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Koehn, and a last name Mace.
| VARIANT | COUNTRY |
|---|---|
| Koehn-Mace | United States |