The Ichirgu-boil or Chargobilya (Old Bulgarian чрьгобыля, Bulgarian: Ичиргу боила) was a high-ranking official in the First Bulgarian Empire. He was the commander of the garrison of the capital and was the third most important person in the state after the ruler and the Kavkhan. In peace-time the ichirgu-boil had diplomatic functions. According to some data the ichirgu-boil personally commanded a squad of 400 heavy cavalrymen.
From one funeral inscription found during excavation works in Preslav is known the ichirgu-boil Mostich who served under the Emperors Simeon I the Great (893-927) and Peter I (927-969). An unknown ichirgu-boil is mention in the Philippi Inscription dating from the reign of Presian.
- Moravcsik, G. Byzantinoturcica II. Leiden 1983, c. 133.
- Бешевлиев В., Прабългарски епиграфски паметници, Издателство на Отечествения фронт, София, 1981