|Khan of Bulgaria|
|Spouse||Unknown Byzantine princess|
|Mother||Anastasia of Byzantium|
Although Telerig is first mentioned by Byzantine sources in 774, he is considered as he immediate successor of Pagan, who was murdered in 768. In May 774, Byzantine Emperor Constantine V embarked on a major expedition against Bulgaria, led his field army on land and dispatched a fleet of 2000 ships carrying horsemen towards the Danube Delta. The fleet disembarked in the vicinity of Varna, but Constantine did not press his potential advantage and inexplicably retreated.
Shortly afterwards, both sides signed a truce promising the cessation of hostilities. However, in October 774, Telerig sent an army of 12,000 men to raid Berzitia, Macedonia, and transfer its population to Bulgaria. Collecting a large army of 80,00 troops, Constantine surprised the Bulgarians and won a resounding victory. The subsequent attack on Bulgaria failed since the imperial fleet had encountered contrary winds in the Black Sea.
Telerig then sent a secret emissary to Constantine that indicated his intention to flee Bulgaria and to seek refuge with the emperor and sought assurances of hospitality and a list of Byzantines who might help him. Telerig succeeded in having the Constantine betray his own agents in Bulgaria, who were duly rounded up and executed. The expected Byzantine retaliation failed to materialise, as Constantine died in 775. In spite of his apparent success, Telerig found it necessary to flee to the new Byzantine emperor, Leo IV the Khazar, in 777. The Byzantine government gave Telerig asylum and the title of patrikios. Telerig converted to Christianity under the name of Theophylaktos and married a cousin of Empress Eirene.
Telerikh is a major character in Harry Turtledove's "Islands in the Sea" (1989). The short story of alternate history originally appeared in Alternatives, edited by Robert Adams, and was reprinted in Departures and The Best Alternate History Stories of the Twentieth Century.
- Byzantium and Bulgaria, 775-831, Panos Sophoulis, BRILL, 2011, ISBN 9004206957, pp. 71-72.
- Word and Power in Mediaeval Bulgaria, Ivan Biliarsky, BRILL, 2011, ISBN 9004191453, p. 211.
- Reading the Middle Ages: Sources from Europe, Byzantium, and the Islamic World, Barbara H. Rosenwein, University of Toronto Press, 2013, ISBN 1442606029, p. 160.
- Southeastern Europe in the Middle Ages, 500-1250, Florin Curta, Cambridge University Press, 2006, ISBN 0521815398,pp. 162-163.
- A Concise History of Bulgaria, R. J. Crampton, Cambridge University Press, 2005, ISBN 1139448234, p. 270.
- Mosko Moskov, Imennik na bălgarskite hanove (novo tălkuvane), Sofia 1988.
- Jordan Andreev, Ivan Lazarov, Plamen Pavlov, Koj koj e v srednovekovna Bălgarija, Sofia 1999.
- (primary source), Bahshi Iman, Djagfar Tarihi, vol. III, Orenburg 1997.