In all the world, Тиугаев (Тиугаев , Tyugaev ) is an extremely rare unknown gender first name. Much more prevalently, Тиугаев is the last name as well as the forename.
Tyuhaev
Сергей, and Евгений
, Tyugaev 
) is an extremely rare unknown gender first name. Much more prevalently, Тиугаев is the last name as well as the forename.