Surname Onwuegbuzie (Onwuegbuzie 
) , globally, is a rare cognomen. The cognomen Onwuegbuzie is habitual in Nigeria, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Nigeria, the United States, and the United Kingdom. Likewise, Onwuegbuzie is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Onwuegbuzie | Germany, Nigeria, United States, United Kingdom, South Africa |
| anthony onwuegbuzie American psychologist, US (b. 1962) |
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| innocent uzougbo onwuegbuzie researcher |
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| anthony onwuegbuzie researcher ORCID ID = 0000-0002-4569-5796 |
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| andrew onwuegbuzie basketball player (1995-), DE (b. 1995) |
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