Cognomen Gjer (Gerr 
, Gjer 
) , in the entire world, is a rare surname. The last name Gjer is habitual in Germany, where it is a rare surname, the United States, where it is a very rare surname, and Indonesia. Also, Gjer is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerr | Philippines, Indonesia, United States, Democratic Republic of the Congo, Germany |
| Gjer | North Macedonia, Thailand |