Cognomen Piknjac (Piknjac 
) , around the world, is a rare last name. The family name Piknjac is habitual in Bosnia and Herzegovina, where it is quite a rare surname, Sweden, where it is a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Piknjac | United States, Sweden, Bosnia and Herzegovina, Germany, Canada |