About Oleg [Helvi III] "Younger" of Kiev
The precise relationship, if any, between the following person and the main line of Rurik is not known
OLEG [Helgi/Haelghe] (-912). The Primary Chronicle records that Rurik bequeathed his realm to Oleg "who belonged to his kin". The Primary Chronicle describes Oleg´s capture of Smolensk, Lyubech and Kiev, where he killed the local rulers Askold and Dir and set himself up as prince. The same source states that he established authority over the Polyanians, Derevlians, Severians and Radimichians, but waged war with the Ulichians and the Tivercians. It also records that, after a Rus attack on Constantinople, Oleg concluded two treaties with Byzantium which established the conditions for future Russian trade with Constantinople. Franklin & Shepard point out the lack of corroboration in Byzantine sources for these early treaties. The Primary Chronicle records that Oleg died from a snake bite.