Surname Duiz (Duiz 
) , all over the world, is a very rare cognomen. The last name Duiz is habitual in Croatia, where it is a rare surname, Austria, and Italy, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Italy, Philippines, and Austria. Much less frequently, Duiz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duiz | Austria, Italy, Philippines, Croatia, Brazil |