Family name Rienz (Rienz 
) , in the entire world, is a very rare last name. The surname Rienz is habitual in Indonesia, where it is a very rare surname, Argentina, where it is an extremely rare surname, and the United States. Also, Rienz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rienz | Argentina, Philippines, Indonesia, United States |