Family name Hermhan (Hermhan 
) , in all the world, is a very rare last name. The last name Hermhan is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Hermhan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hermhan | Thailand, Peru, United States |