Worldwide, Rouiller (Roil 
, Rouiller 
, Руйе 
) is a rare primarily masculine, but very infrequently female given name. The first name Rouiller is characteristic of Switzerland, where it is a rare female name, Philippines, where it is a rare masculine name, and Greece. In absolute terms, it is the most numerous in Philippines, Indonesia, and India. More frequently, Rouiller is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Roil | Philippines, Indonesia, United States, Argentina, Germany |
| Rouiller | Uruguay, Switzerland, France, United States, Argentina |
| Руйе | Kyrgyzstan, Russia |