Cognomen Фьелльнер (Фьелльнер 
, Fjellner 
) , around the world, is a rare family name. The family name Фьелльнер is habitual in Northern Europe, particularly Sweden, where it is quite a rare surname, Estonia, where it is a rare surname, and Norway. Measured by absolute frequency, it most frequently occurs in Sweden, Canada, and Norway.
| VARIANT | COUNTRY |
|---|---|
| Фьелльнер | Russia |
| Fjellner | Norway, Estonia, Canada, United States, Sweden |