Family name Urtiaga (Urtiaga 
) , across the world, is quite a rare surname. The last name Urtiaga is characteristic of Uruguay, where it is quite a rare surname, Argentina, and Spain, where it is a rare surname. In absolute terms, it most frequently occurs in Argentina, Spain, and Mexico. Very seldom, Urtiaga is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Urtiaga | Mexico, Uruguay, United States, Argentina, Spain |
| pedro de la concepcion y urtiaga Roman Catholic bishop (b. 1664) |
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| emilio salgado urtiaga ES (b. 1897) |
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| josé antonio urtiaga Spanish association football player, ES (b. 1942) |
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| juan gonzález urtiaga UY (b. 1943) |
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| koldo urtiaga Spanish rower, ES (b. 1957) |
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| marcelo urtiaga Uruguayan painter, UY (b. 1972) |
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| carmen urtiaga researcher |
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| miren karmele urtiaga researcher ORCID ID = 0000-0002-4921-8890, ES |
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| radames urtiaga botanist |
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| matxalen santos urtiaga researcher |
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| ane urtiaga researcher ORCID ID = 0000-0002-8189-9171 |
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| domingo urtiaga |
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| olaia urtiaga ES (b. 1983) |
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