Family name ガンマ (Gamma 
, ガンマ 
) , in all the world, is quite a rare last name. The surname ガンマ is characteristic of Switzerland, where it is quite a common surname, Uruguay, where it is a rare surname, and Israel. Measured by absolute frequency, the name is most common in Switzerland, Indonesia, and India. Likewise, ガンマ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gamma | Indonesia, Switzerland, United States, India, Democratic Republic of the Congo |
| ガンマ | Japan |