Family name Onasanya (Onasanya 
) , globally, is quite a common cognomen. The family name Onasanya is characteristic of Nigeria, where it is quite a rare surname, Niger, where it is a rare surname, and the United Kingdom. Also, Onasanya is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Onasanya | Canada, Niger, Nigeria, United States, United Kingdom |
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tewa onasanya British-Nigerian Publisher, mindset stylist, philanthropist and the Founder/CEO of Exquisite Magazine Services Ltd, the publishers of Exquisite Magazine and the organisers of EMAC Walk and ELOY Awards, NG (b. 1978) |
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fiona onasanya British former politician (born 1983), GB (b. 1983) |
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jennifer onasanya Dutch-born Austrian bobsledder, AT (b. 1994) |
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| maria onasanya researcher (ORCID 0000-0003-3370-519X) |
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