Family name Евстахий (Евстахий 
, Yevstakhiy 
, Evstahij 
) , all around the world, is a very rare last name. The surname Евстахий is characteristic of Southern Europe, particularly Slovenia, where it is a rare surname. More frequently, Евстахий is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Евстахий | Kazakhstan, Ukraine, Russia |
| Yevstakhiy | Poland, United States, Ukraine |
| Evstahij | Slovenia |
Efstathios, Eustac, Eustacchio, Eustace, Eustach, Eustache, Eustachio, Eustachy, Eustacio, Eustacius, Eustacjusz, Eustahije, Eustaqui, Eustaquio, Eustasio, Eustasius, Eustathios, Eustazio, Eustazy, Eustațiu, Eustácio, Eustáquio, Evstafy, Evstahiy, Ostap, Stathis, Ευστάθιος, Στάθης, Астафий, Евстатий, Евстафий, Остап, Остафий, Стафей, Эсташ, Юстас, and Євстафій