Last name Alcayaga (Alcayaga 
) , around the globe, is quite a rare surname. The surname Alcayaga is characteristic of Latin America and the Caribbean, particularly Chile, where it is quite a common surname, Guatemala, where it is quite a rare surname, and Argentina. Not in comparison with a country's population, it is the most numerous in Chile, Philippines, and Argentina.
| VARIANT | COUNTRY |
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| Alcayaga | Chile, United States, Argentina, Philippines, Guatemala |
| francisco alcayaga (b. 1806) |
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| idelfonso rivera alcayaga Chilean physician and politician, CL (b. 1871) |
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mario selim alcayaga Chilean film director, CL (b. 1977) |
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| zulema alcayaga Argentinian composer, AR (b. 1943) |
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| juan alcayaga CL (b. 1949) |
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| eduardo alcayaga Chilean business engineering, CL (b. 1962) |
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| eufemio alcayaga Argentine politician, AR |
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| julio alcayaga researcher ORCID ID = 0000-0001-8119-8917 |
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| ángel custodio veas alcayaga Chilean politician, CL |
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