Family name Guilberg (Guilberg 
, Гильберг 
) , worldwide, is a very rare surname. The family name Guilberg is habitual in Russia, where it is a very rare surname, Nicaragua, and Ukraine, where it is an extremely rare surname. Very seldom, Guilberg is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guilberg | Brazil, Nicaragua |
| Гильберг | Russia, Ukraine |