Worldwide, Манташева (Манташева ) is an extremely rare unknown gender forename. Much more frequently, Манташева is the last name as well as the forename.
Mantasheva
Анна, Айна, Ирина, Софья, Янина, Марина, Джамиля, Людмила, Татьяна, Шахриза, and Валентина