Around the globe, Ranulfo (Ranulfo 
) is a common boy's first name. The first name Ranulfo is characteristic of Mexico, where it is quite a common masculine name, Philippines, where it is quite a rare masculine name, and Peru. Measured by absolute frequency, it is the most numerous in Mexico, Philippines, and Brazil. Likewise, Ranulfo is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Ranulfo | Mexico, Brazil, Peru, Argentina, Philippines |
| ranulfo pinheiro lima Brazilian politician, BR (b. 1884) |
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| dom ranulfo da silva farias BR (b. 1887) |
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ranulfo romo Mexican physiologist, MX (b. 1954) |
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| ranulfo rosas Mexican association football player, MX (b. 1934) |
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| ranulfo cortés Mexican footballer, MX (b. 1934) |
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| ranulfo fuentes rojas (b. 1940) |
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| ranulfo fuentes rojas (b. 1940) |
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| ranulfo bocaiúva cunha Brazilian politician, BR |
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| ranulfo marques leal Brazilian politician, BR |
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| ranulfo romo researcher |
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| ranulfo gonzález obando Colombian entomologist, CO |
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| ranulfo tonche pacheco Mexican politician |
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| ranulfo combuca da silva junior researcher (ORCID 0000-0001-6655-6368) |
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| ranulfo viana |
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