1 Sources: RC 143; Clarkson; Riasanovsky; A. Roots 241; Kraentzler 1484. Grand Prince of Novgorod and Kiev. He was killed while collecting tribute in 945. He ruled from 913-945. His wife, St. Olga, acted as regent from 945-962. Roots: Igor, Grand Prince of Kieve, died 947. K: Igor I of Novgorod, Prince of Novgorod.