▁they ▁were ▁two ▁different ▁persons ▁and ▁families . ▁Z lat ar ski ▁pointed ▁out , ▁which ▁points ▁R unc iman ▁considered ▁to ▁be ▁ind is put able ; ▁if ▁Ir nik ▁was ▁Er nak , ▁then ▁both ▁Er nak ▁and ▁A til la ▁belonged ▁to ▁the ▁D ulo ▁cl an , ▁whereas , ▁actually , ▁no ▁source ▁mentions ▁D ulo ▁cl an ▁in ▁connection ▁with ▁them ; ▁according ▁to ▁the ▁Nom inal ia ▁Ir nik ▁ruled ▁from ▁ 4 3 7 , ▁i . e . ▁several ▁years ▁before ▁the ▁death ▁of ▁Att ila ▁in ▁ 4 5 3 , ▁which ▁is ▁impossible . ▁Due ▁to ▁be ▁assigned ▁a ▁reign ▁of ▁ 1 5 0 ▁years , ▁R unc iman ▁considered ▁the ▁in ac cur acy ▁of ▁the ▁date ▁of ▁acc ession ▁as ▁ven ial ▁mistake . ▁ ▁Kurt ▁( K ub rat ; ▁c . ▁ 6 3 2 – 6 6 5 ), ▁a ▁member ▁of ▁the ▁cl an , ▁revol ted ▁against ▁the ▁P annon ian ▁Av ars ▁and ▁founded ▁the ▁Old ▁Great ▁Bulg aria ▁on ▁the ▁territory ▁of ▁modern ▁Ukraine . ▁During ▁the ▁second ▁half ▁of ▁the ▁ 7 th ▁century ▁his ▁sons ▁split ▁up ▁the ▁Bulgar ▁royal ▁family ▁and ▁spread ▁over ▁Europe , ▁from ▁the ▁Vol ga ▁river ▁to ▁the ▁shadow ▁of ▁Mat ese ▁mountains : ▁Bez mer ▁( U k raine ), ▁Kot rag ▁( Vol ga ▁Bulg aria ), ▁K uber ▁( B alk an ▁Mac ed onia ), ▁As par uk h ▁( Dan ube