Cognomen Castelltort (Castelltort 
) , worldwide, is a rare family name. The last name Castelltort is habitual in Spain, where it is a rare surname, Philippines, and Mexico, where it is a very rare surname. Very seldom, Castelltort is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Castelltort | Spain, Philippines, Mexico, Argentina, France |
| josé castelltort subeyre Spanish bishop (1899-1960), ES (b. 1899) |
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| rosa castelltort Spanish athletics competitor, ES (b. 1910) |
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| maria mercè castelltort i vila Spanish athletics competitor, ES (b. 1912) |
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| romà castelltort i vila ES (b. 1906) |
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| dolores castelltort ES (b. 1913) |
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| ignacio castelltort miralda ES (b. 1914) |
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| ramón maría castelltort miralda ES (b. 1915) |
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| francina castelltort i riba ES (b. 1956) |
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| sébastien castelltort researcher, ORCID id # 0000-0002-6405-4038 |
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