Cognomen Castagna (Castagna 
, Kastano 
, Кастанья 
) , globally, is a common family name. The surname Castagna is habitual in Aland Islands, where it is quite a common surname, Malta, and Italy. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Argentina. Very seldom, Castagna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castagna | Brazil, Italy, Argentina, United States, France |
| Kastano | Greece, India, United States |
| Кастанья | Ukraine |
Castagnetta, Castagno, Castagnola, and Castagña
| filippo castagna Maltese politician 1765 - 1830 (b. 1765) |
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| michelangelo castagna IT (b. 1783) |
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| peter paul castagna Maltese playwright (b. 1827) |
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| pasquale castagna IT (b. 1819) |
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| niccola castagna IT (b. 1823) |
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| niccola castagna (b. 1823) |
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| pietro castagna IT (b. 1838) |
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| giovanni castagna Italian photographer, IT (b. 1866) |
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| ludwig castagna Austrian mechanic and inventor, AT (b. 1867) |
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william j. castagna American judge (1924-2020), US (b. 1924) |
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| gian giacomo castagna IT (b. 1884) |
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alberto castagna Italian journalist (1945-2005), IT (b. 1945) |
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| bruna castagna Italian singer, IT (b. 1896) |
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| salvatore castagna Italian general, IT (b. 1897) |
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| francesco castagna IT (b. 1897) |
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