Family name Вадас (Vadas 
, Vadász 
, Вадас 
) , in the world, is quite a common surname. The cognomen Вадас is characteristic of Hungary, where it is quite a common surname, Croatia, where it is quite a rare surname, and Romania. Measured by absolute frequency, this name is the most popular in Hungary, India, and the United States. Much less frequently, Вадас is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vadas | United States, Hungary, India, Romania, Croatia |
| Vadász | United States, Hungary, Germany, United Kingdom, Romania |
| Вадас | Ukraine, Bulgaria |