Cognomen Gregori (Григорий 
, Gregori 
, غريغوري 
) , globally, is a common family name. The cognomen Gregori is habitual in Kyrgyzstan, where it is quite a common surname, Italy, and Moldova, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Italy, Russia, and Spain. More frequently, Gregori is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Григорий | Kazakhstan, Russia, Moldova, Kyrgyzstan, Belarus |
| Gregori | Russia, Spain, Dominican Republic, Italy, India |
| غريغوري | Lebanon |
| Грегори | Russia, Ukraine |
| gregori coniades Byzantine Greek astronomer (b. 1240) |
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| giovanni de gregori Italian printer (b. 1500) |
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| alberto gregori IT (b. 1560) |
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| annibale gregori Italian composer and Cornett, IT (b. 1585) |
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| antonio di taddeo gregori (b. 1583) |
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| antonio gregori (b. 1583) |
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gregorio gual y pueyo Spanish military personnel, ES (b. 1670) |
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| gregori codina ES (b. 1619) |
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| giovanni lorenzo gregori Italian composer, IT (b. 1663) |
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| gregori semenovich vasiltchikov (b. 1663) |
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| girolamo gregori Italian painter (1694-1773), IT (b. 1694) |
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| carlo gregori Italian painter and engraver, IT (b. 1702) |
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| ferdinando gregori Italian engraver, FR (b. 1743) |
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luigi gregori Italian painter (1819-1896), IT (b. 1819) |
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| gaspare de gregori (1768-1846), FR (b. 1769) |
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