Across the world, Iuyen (Юыен , Iuyen ) is an extremely rare unknown gender first name. Very seldom, Iuyen is the last name as well as the forename.
Йуен, and Йуыен
Huan, and Nguyen
, Iuyen 
) is an extremely rare unknown gender first name. Very seldom, Iuyen is the last name as well as the forename.