 The researchers of history of Perm Krai connect it with Tatarian prince Mametkul, who settled in the region before or during the reign of Ivan the Terrible and was an imam, or mullah.His elder son, Urak-bey Mametkulov, lived at the Upper Mulyanka, and the younger son, Irak-bey Syundyuk-bey Mametkulov lived at the Lower Mulyanka.So came the names of this rivers and the villages Verkhniye Mully (meaning, 'The Upper Mullahs') and Nizhniye Mully ('The Lower Mullahs'), respectively.