Surname San Nicolas (San Nicolas 
) , in the entire world, is quite a rare last name. The surname San Nicolas is characteristic of Guam, where it is a common surname, Ecuador, where it is quite a rare surname, and Philippines, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Philippines, Mexico, and Guam. Much less frequently, San Nicolas is the forename as well as the last name.
| VARIANT | COUNTRY |
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| San Nicolas | Philippines, Guam, Mexico, France, Ecuador |
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michael san nicolas Guam politician, US (b. 1981) |
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| joey san nicolas CNMI politician, Mayor of Tinian, US (b. 1973) |
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| rackel san nicolas researcher ORCID ID = 0000-0002-7866-630X (b. 1982) |
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Aj, Paul, Pili, Raul, Rosa, Rose, Rene, Remi, Rean, Rita, Riza, Ruby, Ryan, Dean, Dion, Gene, Gena, Gian, Gina, Lina, Lisa, Liza, Kyle, Lony, Anne, Alan, Ana, Pam, Ray, Djo, Gil, Lee, Liz, Lyn, Jon, Joe, Joy, Jen, Tad, Eve, Eva, Marc, Mary, Mark, Matt, Myra, Alex, Alma, and Luis