Surname Irastorza (Irastorza 
) , in all the world, is quite a rare family name. The surname Irastorza is habitual in Uruguay, where it is quite a rare surname, Argentina, and Spain. Measured by absolute frequency, the name is most common in Argentina, Spain, and France. Much less frequently, Irastorza is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Irastorza | Argentina, France, Mexico, Spain, Uruguay |
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jose zapirain irastorza ES (b. 1842) |
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francisco javier de irastorza loinaz Roman Catholic bishop (1875-1943), ES (b. 1875) |
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iñake irastorza Spanish actress, ES (b. 1955) |
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| jose arana irastorza (1913-1936), ES (b. 1913) |
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| itziar mujika irastorza ES (b. 1904) |
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| estefana irastorza ES (b. 1925) |
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| jose uria irastorza ES (b. 1927) |
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| mikel irastorza Spanish politician, ES (b. 1975) |
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| eric irastorza French pelotari, FR (b. 1976) |
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| ramiro m irastorza researcher |
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| aitziber irastorza researcher |
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| guillermo ruiz irastorza researcher |
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| bernardo irastorza Roman Catholic clergyman |
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| ainhoa irastorza researcher |
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| igor g. irastorza researcher ORCID ID = 0000-0003-1163-1687 |
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Mr, Rosa, Rene, Rita, Dani, Dora, Luis, Jany, Jose, Josu, Jone, Jean, Juli, Juan, Nora, Elsa, Elva, Elba, Eloy, Elfa, Eric, Erik, Raul, Poli, Paul, Koro, Ana, Ane, Jon, Joe, Nan, Edi, Fco, Iã, Yon, Mara, Emma, Manu, Sara, Alex, Alan, Alba, Aldo, Aida, Airi, Cleo, Beã, Blas, Maia, and Hada