Sviatopolk II of Kiev

Sviatopolk II Iziaslavich (; ; ; November 8, 1050 – April 16, 1113) was supreme ruler of the Kievan Rus for 20 years, from 1093 to 1113. He was not a popular prince, and his reign was marked by incessant rivalry with his cousin Vladimir Monomakh.
Early life.
Sviatopolk was the son of Iziaslav Iaroslavich by his concubine. Sviatopolk's Christian name was Michael. During his brother Iaropolk's life, Sviatopolk was not regarded as a potential claimant to the throne of Kiev (Kyiv). In 1069 he was sent to Polotsk, a city briefly taken by his father from the local ruler Vseslav, and then he spent ten years (1078–88) ruling Novgorod. Upon his brother's death he succeeded him in Turov, which would remain in possession of his descendants until the 17th century.
Reign.
When Vsevolod Iaroslavich died in 1093, Sviatopolk was acknowledged by other princes as the senior son of Veliki Kniaz and permitted to ascend the Kievan throne. Although he participated in the princely congresses organized by Vladimir Monomakh, he is sometimes charged with encouraging internecine wars among Rurikid princes. For instance, he sided with his cousin David of Volhynia and his son-in-law Bolesław III Wrymouth in capturing and blinding one of the Galician princes. He also sided with Vladimir Monomakh in several campaigns against the Kypchaks but was defeated in the Battle of the Stugna River (1093). Later that year, Sviatopolk would face the Kypchaks again, and again be defeated. Whereupon the Kypchaks destroyed Torchesk, an Oghuz Turk settlement.
In 1096, in an attempt to force Oleg I of Chernigov into a Rus compact, Sviatopolk left his lands undefended. His father-in-law, Tugorkhan raided Pereiaslavl, while Boniak raided as far as Kiev, destroying Berestovo and sacking the three monasteries of Klov, Vydubichi, and the Caves. Tugorkhan would be killed during his raid on Pereiaslavl, consequently Sviatopolk would have him buried in Kiev.
Sviatopolk's Christian name was Michael, so he encouraged embellishment of St Michael's Abbey in Kiev, which has been known as the "Golden-Roofed" up to the present. The history now known as "the Primary Chronicle" was compiled by the monk Nestor during Sviatopolk's reign.
Marriage and children.
Sviatopolk married firstly a Bohemian princess (Přemyslid dynasty), probably a daughter of Duke Spytihněv II. They had three children:
Secondly, in 1094 Sviatopolk married to a daughter of Tugorkhan of the Kypchaks, Olena. They had four children:
In 1104, Sviatopolk would marry for a third time to Barbara Komnena.
Some sources claim Sviatopolk had an out-of-wedlock son Mstislav who ruled Novgorod-Sieversky in 1095–1097 and later Volyn (1097–1099). Mstislav later was murdered in Volodymyr-Volynski.