Worldwide, Frein (Phanh 
, Fren 
, Freno 
) is a rare largely male, but infrequently girly forename. The first name Frein is characteristic of Indonesia, where it is a rare boy's name, Israel, where it is a rare feminine name, and Saudi Arabia, where it is a very rare boy's name. In absolute terms, the name is most common in Indonesia, the United States, and Vietnam. Likewise, Frein is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Phanh | Canada, France, Vietnam, United States, Laos |
| Fren | Germany, France, Indonesia, United States, Italy |
| Freno | Germany, France, United States, Philippines, Italy |
| Frein | Brazil, Germany, France, United States, Italy |