bey
The title of bey means actally "chieftain," and was traditionally applied to leaders of Turkish tribal groups, in the Ottoman Empire also to administration or military officials. The regions or provinces where beys ruled or which they administered by them were called beylik.

mutasarrıf
Ottoman official of the provincial administration, the governor of a mutasarrıflık.

sancak (liva)
Medium sized unit of provincial administration of the Ottoman state, throughout its history. A subdivision of the early Ottoman eyalet (or beylerbeylik) and the later Ottoman vilayet. In the late Ottoman Period it was known also as mutasarrıflık.

vilayet (valilik)
The larger administrative unit in the Ottoman provincial administration system. The large provinces of the Ottoman Empire were previously called eyalet. The new regulation of 1864 introduced the vilayet as an equivalent of the French départment - albeit of smaller size. The governor of the vilayet was called vali and had extensive authority.

voyvoda
State official of the Ottoman Empire, governor of an administrative area.