Cognomen Efstathios (Efstathios 
) , around the globe, is a common surname. The last name Efstathios is habitual in Greece, where it is a common surname, and Germany, where it is a very rare surname. Also, Efstathios is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Efstathios | Germany, Cyprus, United Kingdom, United States, Greece |
Eustac, Eustacchio, Eustace, Eustach, Eustache, Eustachio, Eustachy, Eustacio, Eustacius, Eustacjusz, Eustahije, Eustaqui, Eustaquio, Eustasio, Eustasius, Eustathios, Eustazio, Eustazy, Eustațiu, Eustácio, Eustáquio, Evstafy, Evstahij, Ostap, Stathis, Ευστάθιος, Στάθης, Астафий, Евстатий, Евстафий, Евстахий, Ефстатиос, Ефстатхиос, Остап, Остафий, Стафей, Эсташ, Юстас, and Євстафій