Page "Tervel of Bulgaria" Paragraph 5

Given the chronological information of the Imennik, Tervel would have died in 715.

However, the Byzantine Chronicler Theophanes the Confessor ascribes Tervel a role in an attempt to restore the deposed Emperor Anastasius II in 718 or 719.

If Tervel had survived this long, he would have been the Bulgarian ruler who concluded a new treaty ( confirming the annual tribute paid by the Byzantines to Bulgaria, the territorial concessions in Thrace, regulating commercial relations and the treating of political refugees ) with Emperor Theodosius III in 716.

However, elsewhere Theophanes records the name of the Bulgarian ruler who concluded the treaty of 716 as Kormesios, i. e., Tervel's eventual successor Kormesiy.

It is probable that the chronicler ascribed the events of 718 or 719 to Tervel simply because this was the last name of a Bulgar ruler that he was familiar with, and that his sources had been silent about the name, as in his account of the siege of Constantinople.

According to another theory Kermesios was authorized by Tervel to sign the treaty.