Surname Costantini (Costantini 
, Константини 
) , all over the world, is a common family name. The family name Costantini is habitual in Italy, where it is quite a common surname, Luxembourg, and Argentina, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Italy, Argentina, and France. Much less frequently, Costantini is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Costantini | Italy, France, Tanzania, United States, Argentina |
| Константини | Ukraine, Russia |
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giovanni battista costantini (b. 1500) |
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| costantini de' servi Italian painter (1554-1622) (b. 1554) |
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| fabio costantini Italian cantor and composer, IT (b. 1575) |
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| toldo costantini Italian poet, IT (b. 1576) |
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| alessandro costantini Italian Baroque composer, IT (b. 1581) |
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angelo costantini Republic of Venice actor, IT (b. 1655) |
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| onofrio costantini Roman Catholic archbishop (b. 1634) |
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| francesco maria costantini author (1639-1713) (b. 1639) |
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| giovanni battista costantini Republic of Venice actor, IT (b. 1654) |
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maria crocifissa costantini Italian nun (1713-1787), IT (b. 1713) |
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| giuseppe antonio costantini (1692-1772) (b. 1692) |
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vincent-marie costantini French soldier, FR (b. 1751) |
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| cosimo mattia costantini author (18th century) (b. 1701) |
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| girolamo costantini Italian painter (1710-1772), IT (b. 1710) |
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| ermenegildo costantini Italian painter (1731-1791), IT (b. 1731) |
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