PreRussia - стр. 9

If we suppose that Rurik came from the island of Rujan, then the inconsistencies between the three sources are significantly smoothed out since in this case Rurik is at the same time a Varangian from across the sea and a Slav living near Prussia. Some historians are inclined to this version. In this scenario Eastern Russia simply invited a Varangian (Viking) ruler from Western Russia. Understandably he became "legitimate" in both parts of Russia and therefore was able to unite the Eastern Slavic principalities with some Western ones into a single state.