Surname Castagnola (Castagnola 
) , in the entire world, is quite a rare last name. The cognomen Castagnola is habitual in Argentina, where it is quite a rare surname, Italy, and Uruguay. In absolute terms, it most frequently occurs in Italy, Argentina, and the United States. Very seldom, Castagnola is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Castagnola | Italy, Uruguay, United States, Argentina, Peru |
Castagna, and Castagñola
| francesco castagnola Italian cardinal, IT (b. 1350) |
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giovanni francesco castagnola author (17th century) (b. 1601) |
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| giuliano castagnola catholic bishop, IT (b. 1572) |
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| bartolomeo castagnola (b. 1583) |
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| carlo andrea castagnola Italian poet, IT (b. 1652) |
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stefano castagnola Italian lawyer, politician and mayor (1825-1891), IT (b. 1825) |
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| francesco castagnola author (19th century) (b. 1801) |
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| paolo emilio castagnola Italian literary critic, IT (b. 1825) |
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| gabriele castagnola Italian painter (1828-1883), IT (b. 1828) |
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| domenico castagnola IT (b. 1839) |
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luigi castagnola Italian politician, IT (b. 1936) |
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| liliana castagnola Italian actress, IT (b. 1895) |
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| roberto castagnola Argentinian association football player, AR (b. 1899) |
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bartolomé castagnola polo player, AR (b. 1970) |
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| giovanni castagnola Italian footballer (1923-2007), IT (b. 1923) |
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