Cognomen Alzaga (Alzaga 
) , all around the world, is quite a common surname. The family name Alzaga is characteristic of Uruguay, where it is quite a rare surname, Philippines, and Argentina. Measured by absolute frequency, it is the most numerous in Philippines, Mexico, and Argentina. Much less frequently, Alzaga is the forename as well as the last name.
| maria francisca paula de alzaga 1 Apr 1737 Castro Urdiales, Cantabria - 2 Mar 1795 Castro Urdiales, Cantabria (b. 1737) |
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| juan josé de alzaga (b. 1791) |
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óscar alzaga Spanish lawyer and politician, ES (b. 1942) |
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| enrique williams alzaga VIAF[248922032] LCAuth[n82045326], AR (b. 1905) |
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| pedro alzaga Uruguayan painter, UY (b. 1910) |
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| fernando arteaga alzaga association football player, ES (b. 1960) |
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| mikel valero alzaga researcher |
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| magdalena robirosa alzaga Peerage person ID=361140 |
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| josé maria sarabia alzaga economist (Universidad de Cantabria) |
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| iñaki alzaga etxeita |
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| luis alzaga |
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