The ruling princely line originated from the first archon who led the Serbs to the Balkans during the emperor Heraclius' reign. However, by the time of the emperor Constantine VII Porphyrogenitus, the names of those early princes faded from the collective memory. In the "DAI", the emperor basically gives the genealogy of the first Serbian ruling dynasty: "After the "Unknown Archon" of the Serbs who fled over to the emperor Heraclius, in the time when Bulgaria was under the rule of the Romans, by the inheritance (rules) his son took over the rule, then his grandson and so other archons from his family line. After a number of years, Višeslav was born who fathered Radoslav, who fathered Prosigoj, who fathered Vlastimir".