Globally, Князьев (Князьев ) is an extremely rare unknown gender first name. Predominantly, Князьев is the last name as well as the forename.
Kniazev, Kniaziev, Knyazev, and Knyazyev
Сергей
) is an extremely rare unknown gender first name. Predominantly, Князьев is the last name as well as the forename.