Maria Ilyinichna Ulyanova

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Maria Ilyinichna Ulyanova (Russian: Мари́я Ильи́нична Улья́нова; 18 February [O.S. 6 February] 1878, Simbirsk – 12 June 1937, Moscow) was a Russian Bolshevik revolutionary, politician, and the younger sister of Vladimir Lenin and Anna Ulyanova.