Surname Gallastegui (Gallastegui 
) , all around the world, is quite a rare family name. The last name Gallastegui is habitual in Argentina, where it is quite a rare surname, Spain, and Slovakia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Argentina, Spain, and Mexico. Very seldom, Gallastegui is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gallastegui | Mexico, Spain, United States, Peru, Argentina |
Gallastegi, and Gallástegui
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miguel gallastegui Spanish pelotari, ES (b. 1918) |
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| modesto arámbarri gallastegui Spanish military personnel (1902-1988), ES (b. 1902) |
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| juan josé gallastegui Argentine violinist (1906-1965), AR (b. 1906) |
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| julián aguirrezabal gallastegui Spanish cyclist, ES (b. 1926) |
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| aratz gallastegui Spanish rugby union player (1976-), ES (b. 1976) |
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| jorge gallastegui researcher, ORCID id # 0000-0002-3819-0183 |
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| nicolas gallastegui researcher (ORCID 0000-0003-3424-2924) |
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| gorka gallastegui Spanish researcher, ES |
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| edurne gallastegui researcher |
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| irantzu gallastegui sodupe ES (b. 1973) |
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Mr, Tere, Nora, Nere, Elsa, Elva, Elba, Edda, Eric, Emma, Hugo, Facu, Ines, Iris, Irma, Igor, Iker, Ione, Olga, Omar, Unai, Xepe, Juan, Jone, Josu, Jose, Sol, Ana, Ane, Amy, Lia, Jon, Ema, Eva, Mari, Mica, Maria, Sofi, Paco, Raul, Rosa, Rita, Dora, Galo, Leda, Luis, Lula, Jack, Cruz, and Mario