Sviatoslav Olgovich was Prince of Novgorod; Novgorod-Seversky; Belgorod-Kievsky; and Chernigov. He was the son of Oleg Sviatoslavich, the prince of Chernigov, and an unnamed daughter of Aepa, a Cuman khan. Wikipedia
Born: 1106
Died: February 15, 1164 (age 58 years)
Parents: Oleg I of Chernigov, Theophania Muzalon, and Oseluk
Children: Igor Svyatoslavich, Vsevolod I Svyatoslavich, and Oleg II Svyatoslavich
Great-grandparents: Yaroslav the Wise and Ingegerd Olofsdotter of Sweden
Great grandchildren: Oleg Kursky, Agafia of Rus, Maria Olegovna, and more
Grandchildren: Vladimir III Igorevich, Roman II Igorevich, Svyatoslav Olgovich, and more