According to Ivo Banac and Miranda Vickers, Hasan was a member of the Serb Šišković clan of Vıçıtırın, whom Serbs held as traitors.
Prema rečima Iva Banca i Miranda Vičkersa, Hasan je bio pripadnik srpskog plemena Šišković iz Vučitrna, koje su Srbi smatrali izdajnicima.