Cognomen Guyvanchi-Juslar (Guyvanchi-Juslar 
) , in the world, is an extremely rare family name. Predominantly, Guyvanchi-Juslar is the forename as well as the last name. Parts of the name also exists independently as a first name Guyvanchi, and a first name Juslar.
| VARIANT | COUNTRY |
|---|---|
| Guyvanchi-Juslar | Democratic Republic of the Congo |