Across the world, Osei-Adu (Osei-Adu 
) is an extremely rare unknown gender forename. Predominantly, Osei-Adu is the last name as well as the forename. Parts of the name also exists independently as a last name Osei, and a last name Adu.
| VARIANT | COUNTRY |
|---|---|
| Osei-Adu | United Kingdom, United States, Netherlands, Ghana |