Last name Leoni (Leoni 
, ليوني 
, Леони 
) , in the entire world, is a common cognomen. The last name Leoni is characteristic of Italy, where it is quite a common surname, Guadeloupe, and Switzerland, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Italy, Brazil, and Indonesia. Likewise, Leoni is the forename as well as the last name.
| domenico leoni doge of Venice (b. 700) |
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| pier leoni 11th century Roman consul, IT (b. 1050) |
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pierleone leoni Italian physician, philosopher and astrologer (1445-1492), IT (b. 1445) |
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| pietro leoni Italian professor, philosopher, grammarian, poet, and humanist (1452-1516), IT (b. 1452) |
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ottavio leoni Roman painter (1578-1630), IT (b. 1578) |
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| pompeo leoni Italian sculptor, IT (b. 1530) |
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| lodovico leoni Italian painter (1531-1606) (b. 1531) |
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| ludovico leoni Italian medalist and painter (b. 1542) |
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| giovanni battista leoni (b. 1542) |
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| leone leoni Italian composer, IT (b. 1560) |
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| alberto leoni [occupation:carmelitano] [dates:1563] [archive:Archivio Biografico Italiano] (b. 1563) |
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| miguel angel leoni (b. 1582) |
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| giovanni antonio leoni Italian composer, IT (b. 1600) |
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| antonio camillo leoni author (17th century) (b. 1601) |
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| battista leoni IT (b. 1614) |
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