Cognomen Gertrud Katharina (Gertrud Katharina 
) , around the world, is an extremely rare surname. The last name Gertrud Katharina is habitual in Southern Europe, particularly Spain, where it is a very rare surname. More frequently, Gertrud Katharina is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gertrud Katharina | Spain, Germany |