Surname Appau (Appau 
) , globally, is quite a common last name. The last name Appau is habitual in Ghana, where it is quite a common surname, Kenya, where it is a rare surname, and Malaysia, where it is a very rare surname. Measured by absolute frequency, the name is most common in Ghana, Kenya, and the United States. Much less frequently, Appau is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Appau | Kenya, Ghana, United Kingdom, United States, India |
| yaw appau Ghanaian judge, GH (b. 1951) |
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| ernest victor appau Ho West District, GH |
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| adriana appau researcher (ORCID 0000-0002-3345-9681) |
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| appau junior boakye-yiadom British artist, GB (b. 1984) |
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