About Oleg / Helgi, Danish prince of Kiev
Oleg of Kiev (also known as Helgi) ruled Russia Kievan Rus from ((879-912)
A relation of the first ruler Rurik, the Varangian Oleg was entrusted by Rurik to take care of his kingdom, and also his young son Ingvar (Igor). Oleg transferred the capital of the state from Novgorod to Kiev. He also launched a raid against Constantinople in 911 that won a favourable trade treaty, which, eventually was of great benefit to both nations.
source http://www.centipedia.com/articles/Oleg_of_Kiev added by Marvin Caulk