Surname Gubar-Guller (Gubar-Guller 
) , all over the world, is an extremely rare cognomen. The last name Gubar-Guller is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Gubar, and a last name Guller.
| VARIANT | COUNTRY |
|---|---|
| Gubar-Guller | United States |