Surname Belaustegui (Belaustegui 
) , around the world, is a rare family name. The last name Belaustegui is habitual in Argentina, where it is quite a rare surname, Chile, where it is a rare surname, and Spain. Not in comparison with a country's population, it most frequently occurs in Argentina, the United States, and Spain. Much less frequently, Belaustegui is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Belaustegui | Spain, Chile, United States, Argentina, Israel |
| juan josé belaustegui (b. 1869) |
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| petra belaustegui (b. 1900) |
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| jorge humberto de belaustegui Argentinian diplomat, AR (b. 1951) |
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| marta belaustegui Spanish actor, ES (b. 1966) |
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| maria jose villaverde belaustegui ES (b. 1960) |
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| ion belaustegui handball player, ES (b. 1979) |
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| manuel cobo belaustegui researcher |
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Jm, Ines, Irma, Ilda, Ivan, Maria, Marta, Manny, Maite, Mirta, Mikel, Sarah, Shari, Sebas, Sebio, Sofia, Ander, Angel, Amber, Aitor, Carla, Carol, Hugo, Eric, Elsa, Naia, Mã, Mª, Ana, Ane, Amy, Pau, Luz, Joe, Ian, Sara, Clara, Alex, Aida, Rosa, Leon, Lisa, Luis, Jane, Jose, Joan, Juan, Toni, Anna, and Brian