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ʿayn, (Arabic: “notable”, )plural Aʿyān, in Islāmic countries, an eminent person. Under the Ottoman regime (c. 1300–1923) the term at first denoted provincial or local notables, but in the 18th and early 19th century it was applied to a class of landlords who exercised political functions and were accorded official status.
Many aʿyān during the 17th century acquired lifelong leases on tax farms and prospered financially. During the 1768–74 Russo-Turkish War, the Ottoman government turned to the aʿyān for military and financial assistance and in return officially recognized them as the chosen representatives of the people. In 1786 the central government, suspicious of the aʿyān’s growing influence, attempted to exclude them from provincial government; but, when war with Russia broke out again (1787), it once more turned to them for assistance and (1790) restored their provincial authority.
During the reigns of Selim III (1789–1807) and Mahmud II (1808–39), the aʿyān in Rumelia (the Balkan section of the empire) played an important part in Ottoman affairs, often defying the central authority. Of these Ali Paşa of Jannina (now in Greece), Pasvanoğlu of Vidin (now in Bulgaria), and İsmail Bey of Seres (now Sérrai, Greece) maintained their own private armies, levied taxes, and dispensed justice. The ʿayn of Rusçuk (now in Bulgaria), Bayrakdar Mustafa Paşa, although he failed to restore Selim III, led a successful coup and brought Selim’s nephew Mahmud II to the throne. Bayrakdar subsequently became grand vizier and convened (1808) a conference of aʿyān and derebeys (“valley lords,” hereditary and virtually independent feudatories in Anatolia) in Istanbul, where they and representatives of Mahmud II signed a mutual assistance pact that recognized and confirmed their status. Soon after, however, Mahmud succeeded in breaking the power of the aʿyān and the derebeys and established his rule over most of the empire.