Oleg I of Chernigov

Oleg Svyatoslavich (c. 1052–1115), a son of Grand Prince Sviatoslav II of Kiev, ruled Vladimir-Volynsk, Tmutarakan, Chernigov and Novgorod-Seversk. In 1078 he allied with the Cumans to seize Chernigov from his uncle Vsevolod, but defeat drove him back to Tmutarakan; he was handed to Byzantium and exiled to Rhodes.

Returning with Cuman aid, he retook Chernigov from Vladimir Monomakh in 1094, lost it in 1096, and from 1097 held Novgorod-Seversk. He founded the Olgovichi clan and never ruled Kiev.