Last name Castaldi (Castaldi 
) , across the world, is quite a common surname. The family name Castaldi is habitual in Italy, where it is quite a rare surname, Malta, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, the name is most common in Italy, the United States, and France. Much less frequently, Castaldi is the forename as well as the last name.
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| Castaldi | France, Argentina, Italy, Brazil, United States |
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panfilo castaldi Italian printer, IT (b. 1430) |
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| angelo castaldi Roman Catholic bishop (b. 1450) |
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| cornelio castaldi IT (b. 1480) |
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| bellerofonte castaldi Italian composer, IT (b. 1580) |
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filippo castaldi Italian portrait painter (b. 1710) |
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| filippo castaldi IT (b. 1734) |
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alfonso castaldi Romanian conductor, composer and music educator (1874-1942), RO (b. 1874) |
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| ettore castaldi Italian painter (1877–1956) (b. 1877) |
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| luigi castaldi Italian anatomist and physiologist, IT (b. 1890) |
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jean-pierre castaldi French actor, FR (b. 1944) |
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| giuseppe castaldi author (20th century) (b. 1901) |
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| vincenzo castaldi Italian chess player (1916-1970), IT (b. 1916) |
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gianluca castaldi Italian politician, IT (b. 1970) |
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| alfa castaldi Italian photographer, IT (b. 1926) |
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| paolo castaldi Italian composer, IT (b. 1930) |
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