Throughout the world, Radau (Radau 
) is a very rare predominantly male, but very seldom feminine first name. The given name Radau is habitual in Romania, where it is a rare boy's name, and India, where it is an extremely rare unisex name. More frequently, Radau is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Radau | Romania, South Africa, United Arab Emirates, Germany, United States |