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Yaroslav Mstislavich was born 1215 to Mstislav Mstivlavich Udatnyi of Novgorod (c1170-1228) and Maria of Cumania (c1185-c1260) and died 1235 of unspecified causes.
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Yaroslav Mstislavich was born 1215 to Mstislav Mstivlavich Udatnyi of Novgorod (c1170-1228) and Maria of Cumania (c1185-c1260) and died 1235 of unspecified causes.