Question: Who is the maternal grandmother of Prince Vsevolod Ivanovich Of Russia?
Sentence (from "Yevdokiya Saburova"): Eudoxia Saburova( died 1620), was a Russian noblewoman, Tsesarevna of Russia as the first spouse of Tsarevich Ivan Ivanovich of Russia, son of Ivan the Terrible.
Relevant evidence: No