Family name Cassiani (Cassiani 
) , around the world, is quite a common cognomen. The last name Cassiani is characteristic of Colombia, where it is quite a rare surname, Venezuela, and Italy. Much less frequently, Cassiani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cassiani | Colombia, Venezuela, Italy, Brazil, United States |
| stefano cassiani Italian painter (1636-1714), IT (b. 1636) |
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| leonardo cassiani Roman Catholic bishop (b. 1639) |
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| giuliano cassiani Italian poet, IT (b. 1712) |
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| paolo cassiani (b. 1743) |
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gennaro cassiani Italian politician (1903-1978), IT (b. 1903) |
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| mario cassiani ingoni IT (b. 1905) |
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| chiaffredo cassiani Italian resistance movement, IT (b. 1916) |
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| francisco cassiani Brazilian painter (1921-2001), BR (b. 1921) |
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| gennaro cassiani Italian historian (1965-), IT (b. 1965) |
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| francisco cassiani Colombian footballer, CO (b. 1968) |
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| geovanis cassiani Colombian footballer, CO (b. 1970) |
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| edwin cassiani Colombian boxer, CO (b. 1972) |
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| silvia helena de bortoli cassiani researcher (ORCID 0000-0003-0914-7511) |
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| giorgio cassiani researcher |
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| massimo cassiani researcher |
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