Cognomen Troyah (Troyah 
) , all around the world, is a very rare family name. The last name Troyah is characteristic of Israel, where it is a rare surname, and the United States, where it is an extremely rare surname. Likewise, Troyah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Troyah | Israel, United States |