Last name Eustacchio (Eustacchio 
) , globally, is a rare family name. The cognomen Eustacchio is characteristic of Austria, where it is a rare surname, Italy, and Belgium. Measured by absolute frequency, it is commonest in Italy, Austria, and France. Likewise, Eustacchio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eustacchio | Germany, Belgium, Austria, Italy, France |
Efstathios, Eustac, 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, Остап, Остафий, Стафей, Эсташ, Юстас, and Євстафій
| johann eustacchio Austrian architect, AT (b. 1869) |
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mario eustacchio Austrian politician, AT (b. 1964) |
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| elena eustacchio researcher |
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