Oleg II Svyatoslavich
Oleg II Svyatoslavich was prince of Novgorod-Seversk from 1164 until the year 1180. He was Prince of Putivl, and upon his father's death, Novgorod-Seversk.
Oleg was born around 1136 as a son of Sviatoslav Olgovich, Prince of Chernigov, and an unnamed Cuman princess, daughter of Aepa, son of Girgen. Dimnik posited that his mother died while giving birth to him, as his father remarried in 1136 to Catherine of Chernigov. Oleg himself married Maria Yurievna, daughter of Yuri Dolgorukiy and his first wife, the daughter of Aepa, son of Osen.
Primary sources
Kievan Chronicle- *