Rostislava Mstislavna
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Rostislava Mstislavna (Russian: Ростислава Мстиславна; Christian name: Feodosia; Russian: Феодосия; died 1241/1244) was the grand princess consort of Vladimir from 1214 until her death as the second wife of Yaroslav II.
Life

Her parents were Mstislav Mstislavich ("the Bold") and a daughter (christened Maria) of the Kipchak khan Kotyan. Information about her is scarce and controversial.[1][2]
She married Yaroslav II of Vladimir in 1214,[1] and is said to have two daughters as well as seven, eight, or nine sons, including Alexander Nevsky,[2][1] although some claim that Yaroslav's issue is from his third wife.[3] She died in Novgorod in 1241 or 1244, assuming the monastic name Yevfrosiniya (Euphrosyne).[2]
She is known to have overseen the construction of the first (wooden) building of the Church of the Nativity of the Theotokos on Mikhalitsa in Novgorod.[4][5]