Surname Castiglioni (Castiglioni 
) , in all the world, is a common family name. The cognomen Castiglioni is habitual in Uruguay, where it is quite a common surname, Italy, and Paraguay, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Italy, Argentina, and Brazil. Much less frequently, Castiglioni is the forename as well as the last name.
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| Castiglioni | Paraguay, Uruguay, Brazil, Italy, Argentina |
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branda castiglioni Italian papal legate and judge (1350-1443), IT (b. 1350) |
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| branda castiglioni 15th-century Catholic bishop, IT (b. 1415) |
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francesco abbondio castiglioni Roman Catholic cardinal (1523-1568), IT (b. 1523) |
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| giovanni giacomo castiglioni IT (b. 1471) |
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| bonaventura castiglioni Italian presbyter, IT (b. 1487) |
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| giannotto castiglioni IT (b. 1532) |
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luigi gomes castiglioni Italian botanist and historian (1757–1832), IT (b. 1757) |
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carlo ottavio castiglioni Italian philologist and numismatist (1784-1849), IT (b. 1784) |
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cesare castiglioni Italian psychiatrist (1806-1871), IT (b. 1806) |
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| alfonso castiglioni (1756-1834), IT (b. 1756) |
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| luigi castiglioni Italian scientist and statesman (1757-1832) (b. 1757) |
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ermenegildo castiglioni Italian merchant, IT (b. 1812) |
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| luigi castiglioni (1766-1847) (b. 1766) |
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| heinrich castiglioni (b. 1790) |
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| tommaso castiglioni author (19th century) (b. 1801) |
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