Surname Casajuana (Casajuana 
) , across the world, is a rare cognomen. The cognomen Casajuana is habitual in Spain, where it is a rare surname, Belgium, and Chile. In absolute terms, the name is most common in Spain, France, and Argentina. Likewise, Casajuana is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Casajuana | Spain, France, Argentina, Chile, United States |
| luis soler y casajuana Spanish politician, ES (b. 1852) |
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| ernest casajuana ribes Catalan writer, ES (b. 1890) |
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| ferran casajuana escofet Catalan drawer, caricaturist and merchant, ES (b. 1899) |
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| joan rigall i casajuana ES (b. 1889) |
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| ernest casajuana escofet ES (b. 1890) |
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carles casajuana Spanish diplomat and writer, ES (b. 1954) |
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| antoni casajuana Spanish handball player, ES (b. 1920) |
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| josep casajuana i pladellorens Spanish politician, ES (b. 1949) |
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| marc casajuana researcher |
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| ester casajuana ES (b. 1985) |
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| viviana salisi casajuana ES |
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