Last name Castelar (Castelar 
) , around the world, is quite a rare family name. The cognomen Castelar is habitual in Latin America and the Caribbean, particularly El Salvador, where it is quite a rare surname, Uruguay, and Mexico, where it is a rare surname. In absolute terms, it most frequently occurs in Mexico, Brazil, and Spain. Much less frequently, Castelar is the forename as well as the last name.
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| Castelar | Mexico, Spain, Argentina, Brazil, Colombia |
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emilio castelar Spanish politician; President of Spain, ES (b. 1832) |
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| concha castelar ES (b. 1818) |
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| josefa castelar MX (b. 1827) |
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armando castelar economist, BR (b. 1955) |
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| josé adán castelar Honduran poet, HN (b. 1941) |
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| yamandú castelar UY (b. 1964) |
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| luiz ivan de melo castelar Brazilian writer, teacher, and economist, BR |
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| beatriz castelar researcher |
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| saúl antonio castelar contreras Salvadoran engineer, SV |
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| marilda castelar researcher |
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| ruy castelar |
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