Cognomen Eustaquio (Eustaquio 
, Eustáquio 
) , in all the world, is a common surname. The cognomen Eustaquio is characteristic of Spain, where it is quite a common surname, Mexico, where it is quite a rare surname, and Peru. Measured by absolute frequency, the name is most common in Mexico, Philippines, and Spain. Also, Eustaquio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eustaquio | Spain, Philippines, Mexico, Argentina, Brazil |
| Eustáquio | Portugal, Canada, Brazil, United States |
Efstathios, Eustac, Eustacchio, Eustace, Eustach, Eustache, Eustachio, Eustachy, Eustacio, Eustacius, Eustacjusz, Eustahije, Eustaqui, Eustasio, Eustasius, Eustathios, Eustazio, Eustazy, Eustațiu, Eustoquio, Eustácio, Evstafy, Evstahij, Ostap, Stathis, Ευστάθιος, Στάθης, Астафий, Евстатий, Евстафий, Евстахий, Остап, Остафий, Стафей, Эсташ, Юстас, and Євстафій
| mauro eustaquio Canadian soccer player, CA (b. 1993) |
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