Cognomen ווזניאק (Wozniak 
, ווזניאק 
, Wozniac ) , in all the world, is a common last name. The cognomen ווזניאק is habitual in Poland, where it is quite a common surname, Ireland, where it is quite a rare surname, and Luxembourg. Not in comparison with a country's population, the name is most common in Poland, the United States, and France. More frequently, ווזניאק is the forename as well as the last name.