Family name Barniz (Barnis 
, Barniz 
) , worldwide, is a rare last name. The surname Barniz is habitual in Lithuania, where it is a rare surname, Nicaragua, and Tunisia. In absolute terms, it is the most numerous in India, Tunisia, and Nicaragua. Likewise, Barniz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Barnis | Tunisia, India, Nigeria, Lithuania, Nicaragua |
| Barniz | Nicaragua, Venezuela, United States, Spain |