Last name Filkas (Filkas 
) , around the globe, is a very rare cognomen. The last name Filkas is habitual in Greece, where it is a rare surname, Croatia, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Greece, Croatia, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Filkas | Canada, Greece, United States, Germany, Croatia |