Surname Idarreta (Idarreta 
) , in all the world, is a rare family name. The family name Idarreta is habitual in Uruguay, where it is a rare surname, Spain, where it is a very rare surname, and Argentina. Very seldom, Idarreta is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Idarreta | Uruguay, Spain, Argentina, Brazil, France |
| satur idarreta production designer (born 1950), ES (b. 1950) |
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| jean idarreta French politician, FR (b. 1968) |
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| josé miguel delgado idarreta ES |
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Ana, Carlos, Regina, Jacobo, Nelida, Nestor, Itziar, Marcelo, Colette, Gustavo, Natalia, Ernesto, Carolina, Bernardo, Genoveva, Sebastian, Silvia, Maria Isabel, Miguel, Oscar, Jose, Jean, Tavi, Tony, Hugo, Maria, Marta, Marga, Maddi, Ander, Ruben, Dario, Jorge, Nancy, Nilda, Maximo, and Marcelo Gabriel