Family name Castrejón (Castrejón 
) , globally, is a rare last name. The family name Castrejón is characteristic of Latin America and the Caribbean, particularly Panama, where it is quite a rare surname, Mexico, where it is a rare surname, and Peru.
| VARIANT | COUNTRY |
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| Castrejón | Peru, Panama, Spain, United States, Mexico |
| francisco castrejón Mexican military personnel (1889-1967), MX (b. 1889) |
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francisco castrejón Mexican footballer, MX (b. 1947) |
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| hilda villegas castrejón Mexican physician, researcher and academic (1931-2012), MX (b. 1931) |
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| héctor vicario castrejón Mexican politician, MX (b. 1962) |
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| mauricio castrejón researcher (ORCID 0000-0001-6942-386X) |
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| francisco de castrejón ES |
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| javier castrejón |
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Ma, Raul, Rosa, Ruby, Dani, Gaby, Lucy, Luis, Jair, Javi, Jose, Joel, Juan, Tere, Nora, Nura, Elsy, Eder, Edna, Etel, Hugo, Flor, Rafa, Inma, Paco, Ciro, Il, Max, Mª, Ale, Ana, Luz, Joe, Nan, Eva, Fer, Mari, Mary, Maru, Maje, Moon, Sara, Alex, Alan, Alba, Alma, Andy, Paty, and Isis