Gleb Svyatoslavich was the ruler of Tmutarakan

Tmutarakan

Tmutarakan was a Mediaeval Russian principality and trading town that controlled the Cimmerian Bosporus, the passage from the Black Sea to the Sea of Azov. Its site was the ancient Greek colony of Hermonassa . It was situated on the Taman peninsula, in the present-day Krasnodar Krai of Russia,...

. He ruled this area under the overal authority of his father Svyatoslav II the Prince of Chernigov

Prince of Chernigov

The Prince of Chernigov was the kniaz, the ruler or sub-ruler, of the Rus' Principality of Chernigov, a lordship which lasted four centuries straddling what are now parts of Ukraine, Belarus and the Russian Federation.-List of princes of Chernigov:...

. In 1064 Gleb was removed from power by the forces of Rostislav

Rostislav of Tmutarakan

Rostislav Vladimirovich was a landless prince from the Rurikid dynasty of Kievan Rus’. He was baptized as Mikhail.During his minority, Rostislav ruled Rostov in the land of the Merya. His father Vladimir of Novgorod was the eldest son of Yaroslav I of Kiev. If Vladimir had not predeceased his...

, the son of a former ruler of Novgorod. In 1065 Svyatoslav restored Gleb to the rulership of Tmutarakan.

However once Svyatoslav had returned with his army back to Chernigov, Rostislav invaded again and displaced Gleb from power once more.

Sources

• Dimnik, Martin. The Dynasty of Chernigov, 1054-1146. (Toronto: Pontifical Institute of Mediaeval Studies, 1994) p. 58¡