All around the world, Viliev (Viliev , Вилиев ) is an extremely rare unknown gender forename. Much more frequently, Viliev is the last name as well as the forename.
Вильев, Вилєв, and Вільєв
Zlatan
, Вилиев 
) is an extremely rare unknown gender forename. Much more frequently, Viliev is the last name as well as the forename.