Last name Kóstas (Константинос 
, Костас 
, Kóstas) , globally, is a very rare family name. The surname Kóstas is characteristic of Eastern Europe, particularly Bulgaria, where it is a rare surname, Russia, where it is an extremely rare surname, and Ukraine. More frequently, Kóstas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Константинос | Ukraine, Russia, Bulgaria |
| Костас | Ukraine, Belarus, Bulgaria, Lithuania, Russia |
Constantios, Costakis, Costantinos, Costas, Costis, Cottas, Dinos, Konstantinos, Konstantios, Konstantis, Konstantínos, Kostakis, Kostas, Kostis, Kosztasz, Kottas, Ntinos, Takis, Κωνσταντής, Κωνσταντίνος, Κωστάκης, Κωστής, Κώστας, Ντίνος, Τάκης, Константий, Константінос, Констанций, קונסטנטין, and قسطنطين