 It has also been suggested that Helgu-Oleg who waged war in the 940s was distinct from both of Rurik's successors. He could have been one of the "fair and great princes" recorded in the Russo-Byzantine treaties of 911 and 944 or one of the "archons of Rus" mentioned in De administrando imperio. Regrettably, the Primary Chronicle does not specify the relations between minor Rurikid princes active during the period, although the names Rurik, Oleg and Igor were recorded among the late-10th-century and 11th-century Rurikids.
