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In all the world, Кащев (Кащев ) is an extremely rare unknown gender given name. Much more prevalently, Кащев is the last name as well as the forename.
Kachtchev, Kashchev, and Kashev
Юра, Стас, Юрій, Вадим, Микола, Михаил, Богдан, Василь, Сергей, Николай, and Григорій