Last name Raddu (Raddu 
) , in the world, is a very rare surname. The cognomen Raddu is habitual in Italy, where it is a very rare surname, Germany, where it is an extremely rare surname, and India. Measured by absolute frequency, it is the most numerous in India, Italy, and the United States. More prevalently, Raddu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Raddu | Italy, India, Germany, United States |