Boila

Boila was a title worn by some of the Bulgar and Göktürk aristocrats in the early First Bulgarian Empire and Second Turkic Khaganate. For the linguists, the title "Boila" is the predecessor or an old form of the title "Bolyar". The Boils were two types: internal and external. The internal Boils were governors of the Comitates . Most of the popular linguists believe that "Boila" has Old Turkic origin and the meaning of the word can be translated as "noble".
The title appears on the 7th/8th century Buyla inscription, with the Greek spelling ΒΟΥΗΛΑ.