Simeon married Maria, a daughter of Jonas Goštautas. In the mid-1450s, Goštautas planned to depose Grand Duke Casimir IV Jagiellon and to install his son-in-law Simeon Olelkovich.[5] Simeon inherited the Principality of Kiev, but after his death it was converted into the Kiev Voivodeship. His descendants continued to claim the rights to the region, but the voivodeship was ruled by appointed officials (voivodes) from other noble families. The loss of Kiev could be attributed to Olelkovich's faith (Eastern Orthodoxy rather than Catholicism) and their close kinship with the grand princes of Moscow, who threatened Lithuania's eastern borders.[6] However, the Principality of Slutsk–Kapyl was not converted into a powiat and remained in the family's hands. Disappointed by prevailing politics, Mikhailo Olelkovich organized opposition to Casimir IV and even attempted a coup in 1481. The plot was uncovered, possibly by the voivode of Kiev, Ivan Chodkiewicz, and Mikhailo was executed.[6] In 1471, Mikhailo had also been involved in a brief alliance when Novgorod Republic invited him to become its ruler in a bid to break away from Moscow's influence. However, the attempt ended in a decisive defeat at the Battle of Shelon.[7]
After Mikhailo's death, the Olelkovichs did not occupy any state offices. They submitted bids for the throne of the Grand Duke in 1492 and 1572, but gained little support.[1]Simeon moved his court from Kapyl to Slutsk, thus establishing the so-called Slutsk line.[3] His descendants are often known as Slutsky. During the Muscovite–Lithuanian Wars, Simeon also won a battle near Babruysk in September 1502 against the Crimean Khanate.[8]Yuri also had possessions in Veisiejai, where he funded the building of a Catholic church, and Liškiava.[1]
^ abcdeZinkus, Jonas; et al., eds. (1985–1988). "Olelkaičiai". Tarybų Lietuvos enciklopedija (in Lithuanian). Vol. 3. Vilnius: Vyriausioji enciklopedijų redakcija. p. 237. LCCN86232954.
^Petrauskas, Rimvydas (2003). Lietuvos diduomenė XIV a. pabaigoje – XV a. (in Lithuanian). Aidai. pp. 115, 189. ISBN9955-445-67-X.
^ abKirkienė, Genutė (2008). "Chodkevičių giminės ištakos". LDK politikos elito galingieji: Chodkevičiai XV–XVI amžiuje (in Lithuanian). Vilniaus universiteto leidykla. p. 90. ISBN978-9955-33-359-3.
^Kirkienė, Genutė (2008). "Chodkevičių giminės ištakos". LDK politikos elito galingieji: Chodkevičiai XV–XVI amžiuje (in Lithuanian). Vilniaus universiteto leidykla. p. 146. ISBN978-9955-33-359-3.