In the entire world, Černaj (Černaj , Чернай ) is an extremely rare unknown gender first name. Much more frequently, Černaj is the last name as well as the forename.
Cernaj
Jan, Marian, Michal, Robert, and Tomáš
, Чернай 
) is an extremely rare unknown gender first name. Much more frequently, Černaj is the last name as well as the forename.