Hersekzade or Hersekli Ahmed Pasha ("Ahmed Pasha, son of the Herzog"; Serbo-Croatian: Ahmed-paša Hercegović; Aхмед-паша Херцеговић; 1456 – 21 July 1517), born as Stjepan Hercegović, was an Ottoman Bosnian general and five-times grand vizier of the Ottoman Empire.
Between late 1473 and early 1474 he departed from Novi (today Herceg Novi) to Istanbul, where he adopted Islam along with the peculiar way of life of the Ottoman court, which made possible his advancement through the Ottoman government and military ranks, eventually occupying top offices of the Empire's government and military as a statesman and navy's grand admiral.
He was third and youngest son of Herceg Stjepan Vukčić, at the time most powerful Bosnian noblemen.
His half-sister, Catherine, converted to Roman Catholicism upon marriage and became pious follower of the church.
[1][2] Stjepan himself left Novi and departed for Istanbul in early 1474, at the latest, where he adopted Islam and changed his name to Ahmed.