Cognomen Casati (Casati 
) , around the world, is a common last name. The family name Casati is habitual in Italy, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Paraguay. Not in comparison with a country's population, the name is most common in Italy, Argentina, and Brazil. Much less frequently, Casati is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Casati | Switzerland, Italy, France, Brazil, Argentina |
| filago casati IT (b. 1550) |
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| cherubino casati IT (b. 1551) |
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| alfonso casati (1565-1621) (b. 1565) |
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paolo casati Italian mathematician, IT (b. 1617) |
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| felice casati Italian monk, IT (b. 1581) |
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| niccolo casati author (17th century) (b. 1601) |
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| gasparo casati Italian composer and cathedral conductor, IT (b. 1610) |
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| francesco casati Roman Catholic archbishop (b. 1620) |
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| giovanni francesco casati (b. 1610) |
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| teodoro casati IT (b. 1625) |
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| alfonso casati (b. 1626) |
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| danese casati IT (b. 1628) |
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| teodoro casati IT (b. 1630) |
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| michele casati Roman Catholic bishop (b. 1699) |
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teresa casati Italian noblewoman, a revolutionary (1787-1830), IT (b. 1787) |
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