Family name Oña (Oña 
, Онья 
) , around the world, is quite a rare cognomen. The cognomen Oña is characteristic of Latin America and the Caribbean, particularly Bolivia, where it is quite a rare surname, Ecuador, and Argentina. Much less frequently, Oña is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oña | Spain, Argentina, Ecuador, Cuba, Bolivia |
| Онья | Kazakhstan |
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íñigo de oña Spanish saint, ES (b. 1000) |
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pedro de oña b. 1560, Burgos, Spain; d. 1626, Gaeta, Italy; theologian and religious scholar; later bishop of Gaeta, Italy, ES (b. 1560) |
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pedro de oña Chilean writer, CL (b. 1570) |
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| francisco de alfaro y oña Spanish sculptor, ES (b. 1572) |
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tomás del corral y oña Spanish physician and senator, ES (b. 1807) |
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maría esperanza oña sevilla Spanish politician, ES (b. 1957) |
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| josé martínez oña ES (b. 1919) |
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maría rosa oña UY (b. 1973) |
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bryan oña association football player, EC (b. 1993) |
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| juan josé oña Uruguayan writer, UY (b. 1957) |
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| erik oña Argentinian composer, music educator and conductor (1961-2019), AR (b. 1961) |
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| juan de oña researcher ORCID ID=0000-0001-7133-2481 |
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| noe oña researcher |
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| misleydis oña Cuban fencer, CU (b. 1981) |
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| angie oña Uruguayan writer, UY (b. 1982) |
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