Surname Cascais (Cascais 
) , throughout the world, is quite a rare last name. The cognomen Cascais is habitual in Portugal, where it is quite a common surname, Angola, where it is a rare surname, and Brazil. Very seldom, Cascais is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cascais | Angola, Brazil, France, United States, Portugal |
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joaquim da costa cascais Portuguese military personnel, poet and playwright, PT (b. 1815) |
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raúl alexandre cascais PT (b. 1879) |
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| antonio cascais Portuguese journalist, PT (b. 1965) |
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| mafalda mp cascais researcher |
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| luís álvares de castro cascais |
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Mr, Davi, Dina, Lara, Lais, Luis, Luiz, Luã, Jair, Jose, John, Joao, Joã, Jean, Nuno, Elsa, Edna, Eric, Hugo, Vera, Ines, Inez, Dete, Ryan, Rita, Rosa, Ms, Mã, Ana, Bru, Rui, Tom, Tã, Fã, Ivo, Mary, Isac, Mico, Anna, Anne, Adam, Ageu, Caio, Caua, Kely, Paul, Phil, Raul, Sara, and Itor