Surname Ollero (Ollero 
, Olero 
) , worldwide, is quite a rare cognomen. The family name Ollero is characteristic of Philippines, where it is quite a rare surname, Spain, and Peru. In absolute terms, it is commonest in Philippines, Spain, and Kenya. Very seldom, Ollero is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ollero | Argentina, United States, Spain, Philippines, Peru |
| Olero | Kenya, Argentina, United States, Spain, Philippines |
| joaquín quintana y ollero ES (b. 1814) |
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| antonio ollero ES (b. 1877) |
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andrés ollero Spanish jurist, ES (b. 1944) |
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| alfredo gómez ollero Spanish military personnel, ES (b. 1905) |
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| carlos ollero gómez Spanish politician and jurist (1912-1993), ES (b. 1912) |
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aníbal ollero baturone researcher, ES |
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| juan carlos ollero President Real Betis Balompié, ES (b. 1948) |
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| héctor sáinz ollero (b. 1957) |
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| mario ollero researcher ORCID ID = 0000-0003-3590-706X |
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| francisco javier ollero researcher |
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| loida zabala ollero Spanish paralympic sportsperson, ES (b. 1987) |
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| javier vaquero ollero |
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