Cognomen Petra-Diana (Petra-Diana 
) , around the world, is an extremely rare last name. Much more frequently, Petra-Diana is the forename as well as the last name. Parts of the name also exists independently as a first name Petra, and a first name Diana.
| VARIANT | COUNTRY |
|---|---|
| Petra-Diana | Germany |
Hartmann, and Wolffersdorff