Last name Bartoss (Bartoss 
) , across the world, is a very rare surname. The last name Bartoss is characteristic of Hungary, where it is a rare surname, Germany, where it is an extremely rare surname, and Argentina. Measured by absolute frequency, this name is the most popular in Hungary, Germany, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Bartoss | United States, Germany, Hungary, Argentina |