Cognomen Gert-Hartwig (Gert-Hartwig 
) , around the globe, is an extremely rare last name. Predominantly, Gert-Hartwig is the forename as well as the last name. Parts of the name also exists independently as a first name Gert, and a last name Hartwig.
| VARIANT | COUNTRY |
|---|---|
| Gert-Hartwig | New Zealand |