Surname Castelló (Castelló 
, كاستيلو 
) , across the world, is quite a rare cognomen. The surname Castelló is habitual in Uruguay, where it is quite a rare surname, Spain, and Cuba. Not in comparison with a country's population, it most frequently occurs in Spain, Egypt, and Cuba. Much less frequently, Castelló is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Castelló | Spain, Uruguay, Mexico, Cuba, Argentina |
| كاستيلو | Palestinian Territory, Egypt |
| joan castelló ES (b. 1450) |
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| vicente castelló spanish painter (1585-1636), ES (b. 1585) |
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| albert borguny i castelló Spanish sculptor, painter and engraver (1707-1770), ES (b. 1707) |
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| pedro castelló ginesta ES (b. 1770) |
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| vicente castelló y gonzález amat Spanish engraver, ES (b. 1815) |
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| josé moreno castelló (b. 1841) |
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gastón castelló Spanish painter (1903-1986), ES (b. 1903) |
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francisco castelló y aleu Catholic executed during the Spanish Civil War, ES (b. 1914) |
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| francesc ballester y castelló (b. 1865) |
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| vicente rubiols castelló ES (b. 1874) |
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josep maria castelló i mateu Spanish politician and journalist, ES (b. 1941) |
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fernando castelló Spanish politician and councillor, ES (b. 1958) |
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| robert castelló Spanish Esperantist (1914-1998), ES (b. 1914) |
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| josep sarobé castelló (b. 1914) |
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| melitó jofre i castelló AT (b. 1916) |
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