Last name Gellem (Gellem 
) , worldwide, is a very rare cognomen. The cognomen Gellem is characteristic of South Africa, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Gellem is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gellem | Costa Rica, United States, South Africa, Philippines |