Family name Kadz (Kadz 
) , all around the world, is a very rare surname. The last name Kadz is habitual in Belgium, where it is a rare surname, Canada, where it is an extremely rare surname, and France. Not in comparison with a country's population, it is the most numerous in Belgium, the United States, and China. Very seldom, Kadz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kadz | Philippines, France, United States, Belgium, China |