This information is problematic, and needs further research.
Relationships between historical figures could have been simplified or even fabricated in the text to give the impression that succession remained within the same family….Precise chronology is also difficult to assess from the Sagas….The conclusion must be that the tight family network described in the Sagas is unlikely to be correct and that the relationships shown below should be treated with considerable caution. http://fmg.ac/Projects/MedLands/NORWEGIAN%20NOBILITY.htm
King Eric Edmundson of Sweden ruled over Finland, Carelia, Esthonia, Courland and "wide over all Austria." These countries belonged to Sweden until King Olof Skoetkonung "let all his scatlands get away from him." The chronicler Rimbert says that Courland, by which he means the Baltic provinces, in 850 belonged to Sweden. Shortly after this date fall, according to Nestor, those of the first Swedish contact with interior Russia (859) and of the founding of the Russian empire by Rurik (862). The Swedish dominion in the Baltic provinces, as well as the early Russian empire, must consequently have held a position similar to the one of Normandie to France and England.