Tamga
Kubrat's Dulo might have been a cousin tribe to the royal Ashina clan from which the Khazar Kaghans claimed descent since they all used the same Tamga. If John of Nikiu's "Quetrades" is indeed Kubrat, this would also explain why Kubrat is mentioned in the Orkhon inscriptions. The trident tamga of the Dulo clan is the tamga of the Ashina clan, a trident later found in the coat of arms of the Bulgarian and Rus dynasties adopted as the national symbol of the Ukraine and Crimea.
Before the Soviet Era, the Dulo Tamga was the original emblem of the Atyrau Province, the historical homeland of the Dulo clan named after the Kypchak form of Attila.
Read more about this topic: Dulo Clan