Last name Castán (Castan 
, Castán 
, Chastaigne 
) , all around the world, is quite a common family name. The surname Castán is characteristic of Martinique, where it is a common surname, France, where it is quite a rare surname, and Spain. In absolute terms, this name is the most popular in Mexico, France, and Spain. Very seldom, Castán is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castan | Germany, Spain, Mexico, Argentina, France |
| Castán | Spain, Mexico, United States, Argentina, Brazil |
| Chastaigne | Martinique, France, United States |
| josé foradada y castán Spanish archivist, ES (b. 1840) |
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| josé castán tobeñas Spanish jurist (1889-1969), ES (b. 1889) |
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| victoriano castán guillén Spanish military personnel, ES (b. 1901) |
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carmen castán Spanish writer, ES (b. 1954) |
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raúl garcía castán Spanish sky runner, ES (b. 1970) |
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| josé maría castán vázquez ES (b. 1923) |
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leandro castán Brazilian footballer, BR (b. 1986) |
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| miguel luesma castán ES (b. 1929) |
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| francisco marín castán Spanish magistrate, ES (b. 1952) |
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| carlos castán andolz Spanish literary critic, ES (b. 1960) |
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| javier sáez castán ES (b. 1964) |
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| helena castán researcher |
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| josep maria castán estivill Spanish politician, ES |
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| carlos castán usieto Spanish association football player, ES (b. 1984) |
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| luciano castán Brazilian footballer, BR (b. 1989) |
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Mª, Karla, Katya, Paula, Pablo, Pilar, Raúl, David, Diego, Dulce, Laura, Lidia, Jaime, José, Jorge, Julio, Nacho, Nuria, Elisa, Elena, Eddie, Fanny, Karen, Clara, Cosme, Chema, Ana, Eva, Marc, Sara, Alba, Anna, Abel, Paul, Paco, Rosa, Irene, Lore, Luis, Jose, Juan, Isis, Olga, Maria, Marta, Sonia, Angel, Anita, Loli, and Oscar