In all the world, Biygereev (Biygereev , Бийгереев ) is an extremely rare unknown gender first name. Much more frequently, Biygereev is the last name as well as the forename.
Биыгереев
Ruslan
, Бийгереев 
) is an extremely rare unknown gender first name. Much more frequently, Biygereev is the last name as well as the forename.