All over the world, Ευστράτιος (Efstratios 
, Istrati 
, Eustratios 
) is a common masculine forename. The first name Ευστράτιος is habitual in Greece, where it is a common boy's name, Germany, where it is a rare boy's name, and Romania. Not in comparison with a country's population, it is the most numerous in Greece, Germany, and the United States. Also, Ευστράτιος is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Efstratios | Bosnia and Herzegovina, Germany, Greece, South Africa, United States |
| Istrati | Mali, Romania, Moldova, United States, Italy |
| Eustratios | Germany, United Kingdom, South Africa, Greece, United States |
Evstratios, and Евстратий
| ευστράτιος αργέντης Greek physician and theologian (1685-1762), GR (b. 1685) |
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ευστράτιος πίσσας Greek soldier, GR (b. 1797) |
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ευστράτιος κλεόβουλος Greek Orthodox cleric, TR (b. 1824) |
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| ευστράτιος αθανασάκος GR (b. 1785) |
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| ευστράτιος παρίσης Greek politician and civil servant (1810-1865), GR (b. 1810) |
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ευστράτιος ευστρατιάδης Greek journalist and scholar, GR (b. 1871) |
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ευστράτιος πελεκίδης Greek archaeologist, GR (b. 1880) |
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| ευστράτιος χριστοδούλου αθανασιάδης Greek poet (1875-1961), GR (b. 1875) |
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| ευστράτιος φωτάκης Greek politician, GR (b. 1882) |
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| ευστράτιος κουλουμβάκης GR (b. 1872) |
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| ευστράτιος γεωργιλαδάκης Greek politician (1883-1967), GR (b. 1883) |
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| ευστράτιος ν. αθανασάκος Greek politician, GR (b. 1901) |
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| ευστράτιος αλιπράντης Greek physician and member of parliament 1904-1969, GR (b. 1904) |
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| ευστράτιος παπαευστρατίου Greek politician, GR (b. 1935) |
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| ευστράτιος κόρακας Greek politician, GR (b. 1940) |
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