Family name Koonze (Koonze 
) , in the world, is a very rare surname. The cognomen Koonze is characteristic of Venezuela, where it is a very rare surname, Colombia, and the United States, where it is an extremely rare surname. Much less frequently, Koonze is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koonze | Venezuela, United States, Canada, Colombia |