Across the world, Остафий (Ostafij 
, Остафий 
, Ostafy 
) is an extremely rare boy's first name. More prevalently, Остафий is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ostafij | Poland, Germany, Brazil |
| Остафий | Kazakhstan, Ukraine, Russia |
| Ostafy | United States, Morocco |
| Ostafii | Romania, Moldova |
Efstathios, Eustac, Eustacchio, Eustace, Eustach, Eustache, Eustachio, Eustachy, Eustacio, Eustacius, Eustacjusz, Eustahije, Eustaqui, Eustaquio, Eustasio, Eustasius, Eustathios, Eustazio, Eustazy, Eustațiu, Eustácio, Eustáquio, Evstafy, Evstahij, Ostafiy, Ostap, Stathis, Ευστάθιος, Στάθης, Астафий, Евстатий, Евстафий, Евстахий, Остап, Стафей, Эсташ, Юстас, and Євстафій