Cognomen Hermosilla (Hermosilla 
) , around the globe, is a common last name. The surname Hermosilla is habitual in Latin America and the Caribbean, particularly Paraguay, where it is quite a common surname, Chile, and Argentina, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Chile, Philippines, and Paraguay. Very seldom, Hermosilla is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hermosilla | Chile, Spain, Paraguay, Philippines, Argentina |
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ignacio de hermosilla ES (b. 1718) |
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| josé de hermosilla Spanish architect, ES (b. 1715) |
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| jerónimo hermosilla y aransay Spanish catholic bishop, ES (b. 1800) |
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| ricardo sepúlveda hermosilla Roman Catholic bishop (1858-1934) (b. 1858) |
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| luis valenzuela hermosilla CL (b. 1891) |
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| héctor barrueto hermosilla Chilean politician, CL (b. 1910) |
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| paulino martínez hermosilla Spanish politician (1916-1997), ES (b. 1916) |
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| jose naranjo hermosilla Spanish politician, ES (b. 1918) |
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| julia hermosilla sagredo ES (b. 1916) |
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| françois hermosilla French politician, FR (b. 1952) |
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| edmundo hermosilla Chilean politician, CL (b. 1956) |
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| gotzon hermosilla Basque writer, ES (b. 1966) |
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| carlos enrique hermosilla Spanish botanist, ES (b. 1970) |
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| nick hermosilla college basketball player (2001–2001) Coastal Carolina |
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| cristopher hermosilla Ph.D. Université Paris-Saclay 2015 |
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