Bulgarism is a political movement for the use of the Bolgar ethnonym among Kazan Tatars. It rejects the use of Tatar in favor of the Volga Bulgars, who are considered to be the ancestors of modern-day Volga Tatars. Therefore, Bulgarism is a narrow term for those Volga Tatars refusing to be called Tatars. Tatars or Tartars is a collective name applied to the Turkic-speaking people of Europe and Asia. ... The Volga Bulgars were a culture in southern modern Russia along the Volga River from approximately 900 to 1300 AD. They were related to the original Bulgars of Old Great Bulgaria which had existed in approximately the same region around 600 to 700. ... Volga Tatars are a Turkic people who live in the central and Eastern European parts of Russia. ...
Swept by the Hunnish wave at the beginning of the 4th century AD, other Bulgartribes broke loose from their settlements in centralAsia to migrate to the fertile lands along the lower valleys of the Donets and the Don rivers and the Azov seashore, assimilating what was left of the Sarmatians.
After the defeat of the Huns in the Battle of Chalons on September 20, 451, and the subsequent disintegration of the Hunnish empire, the Bulgartribes dispersed mostly to the eastern and southeastern parts of Europe.
The khan’s eldest son, Batbayan (Bayan, Boyan), remained the ruler of the land north of the Black and the Azov Seas, which was, however, soon subdued by the Khazars.
After the utter defeat of the Huns in the Battle of Chalons on September 20, 451 AD, the Bulgars redirected their attention to Byzantium where consecutive raids were undertaken in the end of the 5th century and the beginning of the 6th century.
United under Kubrat (Kurt) of the Dulo clan, they broke loose from the khanate and formed an independent state between the lower course of the Danube to the west, the Black and the Azov Seas to the south, the Kuban river to the east, and the Donets river to the north.
The Bulgars converted to Judaism in the 9th century, along with the Khazars, and were eventually assimilated.