Die drei Königskinder

Also known as Sechs auf einen Streich - Die drei Königskinder, Les Contes de Grimm ː Les Trois Enfants Royaux, Трое наследников короля

Two royal children are abandoned in the river by their evil grandmother just after their birth. However, a miller and his wife have raised the foundlings as their own beloved children. The wicked old queen discovers that the children are still alive.