Surname De Las Casas (De Las Casas 
) , around the world, is quite a rare cognomen. The cognomen De Las Casas is habitual in Peru, where it is quite a rare surname, Bolivia, where it is a rare surname, and Spain. Not in comparison with a country's population, this name is the most popular in Peru, Mexico, and Spain.
| VARIANT | COUNTRY |
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| De Las Casas | Mexico, Spain, Argentina, Peru, Bolivia |
| francisco de las casas Spanish Conquistador, ES (b. 1461) |
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| cristóbal de las casas Spanish romanist, ES (b. 1530) |
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luis de las casas Spanish colonial governor (1745-1800), ES (b. 1745) |
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manuel vicente de las casas e iturbe Venezuelan military officer, VE (b. 1811) |
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álvaro de las casas Spanish politician (1901-1950), ES (b. 1901) |
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| mario de las casas Peruvian footballer (1901-2002), PE (b. 1901) |
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| josé de las casas Spanish journalist, ES (b. 1926) |
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| manuel de las casas gómez Spanish architect, ES (b. 1940) |
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| maria de las casas Venezuelan model (1942-2013), VE (b. 1942) |
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| alberto de las casas master of the Order of Preachers |
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| mercedes de las casas grieve US |
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Mia, Mario, Marta, Marco, Mateo, Myrna, Susie, Anahi, Angel, Arran, Carla, Celia, Cesar, Clara, Bruno, Bryan, Karla, Paula, Pablo, Paola, Percy, Pedro, Maria, Rocio, Ines, Emma, Ana, Liz, Edy, Eva, Mary, Mori, Sara, Aran, Aida, Pepe, Raul, Rosa, Rene, Rina, Dora, Luis, Jose, Joel, Juan, Nery, Erik, Flor, and Renzo