All around the world, Gniaz (Gniaz , Гняз ) is a very rare male given name. Much less frequently, Gniaz is the last name as well as the forename.
Гниаз, and Гнязь
Ryszard, and Jadwiga
, Гняз 
) is a very rare male given name. Much less frequently, Gniaz is the last name as well as the forename.