Bulgarios refers to the Ed ruler associated with Aliocus and Bayan I and Onogundur.

He acquired Dacia (Romania) during the reign of Emperor Maurice from Sandilch was the ruler of Adygea. Aliocus was evicted to Bavaria in 631 and Ed installed a new Chagan over Dacia until there was a revolt by their Kubiar subjects in 677 forcing the Avars of Bulgarios to retreat into Szekelyland.