Cognomen Dadau (Dadau 
) , in all the world, is a rare surname. The last name Dadau is characteristic of Malaysia, where it is a very rare surname, Nigeria, and India, where it is an extremely rare surname. More prevalently, Dadau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dadau | Nigeria, Tunisia, Malaysia, Brazil, India |