Cognomen Onyekwelu (Onyekwelu 
) , worldwide, is quite a rare last name. The last name Onyekwelu is habitual in Nigeria, where it is quite a rare surname, Niger, where it is a rare surname, and Ireland. In absolute terms, it is commonest in Nigeria, Niger, and the United States. Likewise, Onyekwelu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Onyekwelu | Niger, United Kingdom, South Africa, Nigeria, United States |
| c. t. onyekwelu Nigerian businessman, NG (b. 1898) |
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| onyinyechukwu m onyekwelu researcher (ORCID 0000-0002-5809-1887) |
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| ikemefuna onyekwelu researcher |
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| ikenna onyekwelu Nigerian media personality |
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