Surname Nwagu (Nwagu 
) , globally, is quite a common family name. The cognomen Nwagu is characteristic of Nigeria, where it is quite a rare surname, Finland, where it is a rare surname, and South Africa, where it is a very rare surname. In absolute terms, the name is most common in Nigeria, South Africa, and the United Kingdom. Also, Nwagu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Nwagu | Nigeria, United States, United Kingdom, Finland, South Africa |
| paulinus igwe nwagu Nigerian politician, NG (b. 1959) |
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| evelyn n nwagu researcher |
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| uche nwagu researcher |
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