The "origo gentis" about five brothers and two sisters who came with their folk to Dalmatia, recorded in Constantine VII's work "De Administrando Imperio", was probably part of an oral tradition, which contradicts the role of Heraclius in the arrival of Croats to Dalmatia. It is similar to other medieval "origo gentis" stories (see for e.g. "Origo Gentis Langobardorum"), and some consider it has the same source as the story of Bulgars recorded by Theophanes the Confessor in which the Bulgars subjugated Seven Slavic tribes, and similarly, Thomas the Archdeacon in his work "Historia Salonitana" mentions that seven or eight tribes of nobles, who he called "Lingones", arrived from Lesser Poland and settled in Croatia under Totila's leadership, as well parallels in Herodotus account about five men and two maidens of the Hyperboreans. In Archdeacon's account is possibly reflected a Lechitic origin of the Croats, while in the Croatian "origo gentis" a migration of seven tribes and chieftains.