Family name Mostajo (Mostajo 
) , in the world, is quite a rare cognomen. The family name Mostajo is characteristic of Bolivia, where it is quite a rare surname, Peru, and Philippines, where it is a rare surname. Very seldom, Mostajo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mostajo | Bolivia, Argentina, Peru, Philippines, Spain |
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carlos salazar mostajo Bolivian writer (1916-2004), BO (b. 1916) |
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| augustin arce mostajo Roman Catholic bishop (b. 1897) |
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| santiago mostajo trigo Spanish bicycle racer (1912-1997), ES (b. 1912) |
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gustavo mostajo PE (b. 1973) |
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| manuel moriche mostajo rugby player and commentator, ES (b. 1950) |
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| nelly mostajo researcher |
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| mercedes fernandez y mostajo researcher |
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| patrícia aixemeno mostajo |
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| ramon aixemeno mostajo ES |
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