Globally, Onyemachi (Onyemachi 
) is quite a common epicene first name. The given name Onyemachi is characteristic of Sub-Saharan Africa, particularly Nigeria, where it is quite a rare gender-neutral name. Likewise, Onyemachi is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Onyemachi | Malaysia, United Kingdom, United States, Nigeria, Italy |
| onyemachi maxwell ogbulu Nigerian academic, NG (b. 1956) |
|
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| chukwuemeka onyemachi Nigerian judoka, NG (b. 1974) |
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