Across the world, Castelló (Castelló 
, كاستيلو 
) is an extremely rare unknown gender forename. Much more frequently, Castelló is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Castelló | Spain, Uruguay, Mexico, Argentina, Cuba |
| كاستيلو | Egypt, Palestinian Territory |
Castelló is also a name for the fictitious and mythical characters: .
| bernat de castelló (b. 1200) |
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paz castelló (b. 1970) |
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| pere martí castelló Spanish footballer, ES (b. 1982) |
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| bernat castelló |
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| pol esteve castelló ES (b. 1981) |
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