Cognomen Castoro (Castor 
, Castoro 
) , around the globe, is a common last name. The surname Castoro is habitual in Philippines, where it is quite a common surname, Haiti, where it is quite a rare surname, and Spain. Measured by absolute frequency, it is commonest in Philippines, the United States, and Brazil. Much less frequently, Castoro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castor | Philippines, Mexico, United States, Tanzania, Brazil |
| Castoro | Italy, Philippines, United States, France, Brazil |
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michele castoro Italian archbishop, IT (b. 1952) |
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| rosemarie castoro American artist, US (b. 1939) |
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| eliseo castoro (b. 1930) |
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| marco castoro Italian journalist, IT (b. 1961) |
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| carlo castoro researcher |
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| ryan j. castoro researcher |
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| ryan j castoro researcher |
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| rocco castoro American editor, US (b. 1982) |
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