Family name Nicasio (Nicasio 
) , worldwide, is a common surname. The family name Nicasio is habitual in the Dominican Republic, where it is quite a common surname, Belize, and Spain, where it is quite a rare surname. In absolute terms, it most frequently occurs in Mexico, Spain, and Philippines. Likewise, Nicasio is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Nicasio | Spain, Philippines, Mexico, Argentina, Peru |
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alberto nicasio wood engraver from Argentina (1902-1980) (b. 1902) |
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lawrence sydney nicasio Roman Catholic bishop, BZ (b. 1956) |
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juan nicasio baseball player from the Dominican Republic, DO (b. 1986) |
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| antonio i nicasio researcher (ORCID 0000-0002-2268-4920) |
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| m. carmen nicasio researcher ORCID ID = 0000-0002-6485-2953, ES |
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