Last name Rettu (Rettu 
) , around the globe, is a very rare family name. The family name Rettu is characteristic of Italy, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and India. Likewise, Rettu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rettu | Nigeria, India, United States, Italy |