The
Nominalia of the Bulgarian Khans states that Asparuh belonged to the
Dulo clan and reigned for 61 years. This long period cannot be accepted as accurate due to chronological constraints, and may indicate the length of Asparuh's life. According to the chronology developed by Moskov, Asparuh would have reigned 668–695. Other chronologies frequently end his reign in 700 or 701 but cannot be reconciled with the testimony of the
Namelist. According to the Byzantine sources, Asparuh was a younger son of
Kubrat, who had established a spacious state ("
Great Bulgaria") in the steppes of modern
Ukraine. Asparuh may have gained experience in politics and
statesmanship during the long reign of his father, who probably died in 665 (apud Moskov). According to
Djagfar Tarikhy (a work of disputed authenticity) Asparuh was made the leader of the
Onogur tribe by his father. After his father's death, Asparuh would have acknowledged the rule of his older brother Bat Bayan, but the state disintegrated under
Khazar attack in 668, and he and his brothers parted ways, leading their people to seek a more secure home in other lands. The inclusion of other languages such as Hunnish, Khazar and Sabir within Oghur Turkic remains speculative owing to the paucity of historical records. Some scholars suggest Hunnish had strong ties with Bulgar and to modern Chuvash[5] and refer to this extended grouping as separate Hunno-Bulgar languages.[6][7] However, such speculations are not based on proper linguistic evidence, since the language of the Huns is almost unknown except for a few attested words, which are Indo-European in origin, and personal names.[a]. ==Establishment of the First Bulgarian Empire==