Last name Callo (Callum 
, Callo 
, Kalyo 
) , worldwide, is a common surname. The surname Callo is characteristic of Jamaica, where it is quite a common surname, Peru, where it is quite a rare surname, and Philippines. In absolute terms, it is the most numerous in Philippines, Peru, and the United States. Also, Callo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Callum | New Zealand, Australia, United States, United Kingdom, Peru |
| Callo | Philippines, United States, United Kingdom, Argentina, Peru |
| Kalyo | Tanzania, Brazil, India, Hungary, Pakistan |
| 卡洛 | China |
| marcel callo French typographer, FR (b. 1921) |
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| kurt levie callo NL (b. 1918) |
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| oswaldo holguín callo (b. 1950) |
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| tiffany callo (b. 1967) |
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| gabriela callo-quinte researcher (ORCID 0000-0003-4479-2014) |
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| melisa callo Argentinian volleyball player, AR (b. 1985) |
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| callo de hacha Mexican Commentator, MX (b. 1986) |
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| christian callo |
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