Vsevolod I Yaroslavich (Ukrainian and Russian: Всеволод I Ярославич, Old Norse: Vissivald), ruled as Grand Prince of Kiev from 1078 until his death. He was the fifth and favorite son of Yaroslav I the Wise by Ingigerd Olafsdottir. He was born around 1030. On his seal from his last years, he was named "Andrei Vsevolodu" in Greek, implying that his baptismal name was Andrew. To back up an armistice signed with the Byzantine Empire in 1046, his father married him to Byzantine Anastasia (d. 1067), who tradition holds was a daughter of Emperor Constantine IX Monomachos by his second wife (he gained the Imperial throne through his third marriage), but no reliable source has ever been found to confirm this. However, the couple's son Vladimir Monomakh bore the family name of the Roman/Byzantine emperor, giving the story credence. Upon his father's death in 1054, he received in appanage the towns of Pereyaslav, Rostov, Suzdal, and the township of Beloozero which would remain in possession of his descendants until the end of Middle Ages. Together with his elder brothers Iziaslav and Sviatoslav he formed a sort of princely triumvirate which jointly waged war on the steppe nomads, polovtsy, and compiled the first East Slavic law code. In 1055 Vsevolod launched an expedition against the Torks who had in the previous years expelled the Pechenegs from the Pontic steppes. He also made peace with the Cumans who appeared for the first time in Europe in the same year. The Cumans invaded his principality in 1061 and routed Vsevolod in a battle. Vsevolod persuaded his brother, Iziaslav, and their distant cousin, Vseslav to join him and they together attacked the Torks in 1060. In 1067 Vsevolod's Greek wife died and he soon married a Kypchak princess, Anna. She brought him another son, who drowned after the Battle of the Stugna River, and two daughters, one becoming a nun and another, Eupraxia of Kiev, marrying Emperor Henry IV. The Cumans again invaded Kievan Rus' in 1068. The three brothers united their forces against them, but the Cumans routed them on the Alta River. After their defeat, Vsevolod withdrew to Pereyaslav. However, its citizens rose up in open rebellion, dethroned Iziaslav, and liberated and proclaimed Vseslav their grand prince. Vsevolod and Sviatoslav made no attempt to expel the usurper from Kiev. Vsevolod supported Sviatoslav against Iziaslav. They forced their brother to flee from Kiev in 1073. Feodosy, the saintly hegumen or head of the Monastery of the Caves in Kiev remained loyal to Iziaslav, and refused to had a lunch with Sviatoslav and Vsevolod. Iziaslav granted Sviatoslav's former principality to Vsevolod, but Sviatoslav's sons considered the Principality of Chernigov as their own patrimony or otchina. Oleg Sviatoslavich made an alliance with the Cumans and invaded Chernigov. Iziaslav came to Vsevolod's rescue and they forced Oleg to retreat, but Iziaslav was murdered in the battle.

SOURCE: (courtesy of Wikipedia)
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Husband of Sofja Aepovna Princess Of The Polowezki; Gytha (Gyda, Gyða) Haraldsdóttir and a Byzantine noblewoman.