Noun
beylerbey (plural beylerbeys)
The governor of a province of the Ottoman Empire, ranking immediately below the grand vizier. (Ottoman administrative title)
Tavil Ahmed launched a revolt soon after the coronation of Ahmed I and defeated Nasuh Pasha and the Beylerbey of Anatolia, Kecdehan Ali Pasha. Source: Internet
The oldest boy, renamed Has Murad, became a personal favorite of Mehmed and served as Beylerbey (Governor-General) of the Balkans. Source: Internet