bey
/beɪ/noun
(pl. -eys)
1- historical the governor of a district or province in the Ottoman Empire〈史〉（奥斯曼帝国的地区或省的）总督, 省长。
1.1
- formerly used in Turkey and Egypt as a courtesy title大人, 老爷（旧时土耳其和埃及人用的尊称）。
词源
Turkish, modern form of beg 'prince, governor'.