Family name Cillero (Cillero 
) , around the globe, is a rare cognomen. The last name Cillero is habitual in Spain, where it is a rare surname, Chile, and Argentina. Not in comparison with a country's population, it is commonest in Spain, Argentina, and France. Also, Cillero is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cillero | Spain, Mexico, France, Chile, Argentina |
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antonio cillero Spanish writer (1917-2007), ES (b. 1917) |
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| andrés cillero (b. 1934) |
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| javi cillero Basque writer, ES (b. 1961) |
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| javier cillero ES (b. 1961) |
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| itziar hoyos cillero researcher ORCID ID = 0000-0002-4768-8354 |
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