Kavkhan

He was a member of the 'Bolyar Counsel' and one of the most important advisers to the Bulgarian ruler; the kavkhan was sometimes his regent or co-ruler.

The last person who had the prerogatives and responsibilities of a kavkhan was Georgi Voiteh,[2] an initiator of the uprising of Peter III (Constantine Bodin) in 1072.

Another famous kavkhan is Peter who carried out three missions in Rome and one in Constantinople during the reign of Boris I.

His merits include the reconstruction of Pliska as a beautiful capital during Omurtag and the completion of the new centralized state administration.

Isbul commanded the Bulgarian armies in successful campaigns against the Byzantines in southern Macedonia.