Maria of Tver

In this name that follows East Slavic naming customs, the patronymic is Borisovna.

Maria Borisovna of Tver (Russian: Мария Борисовна; 1442 – 22 April 1467) was the grand princess of Moscow as the first wife of Ivan III from 1462 until her death in 1467.^[1][2][3] She was the daughter of Boris of Tver.^[4]

Maria Borisovna
Wedding of Maria and Ivan III, miniature from the Illustrated Chronicle of Ivan the Terrible
Grand Princess consort of Moscow
Tenure	28 March 1462 – 22 April 1467
Predecessor	Maria of Borovsk
Successor	Sophia Palaiologina
Born	c. 1442 Tver
Died	April 22, 1467(1467-04-22) (aged 24–25) Moscow
Burial	Ascension Convent, Kolomenskoye Archangel Cathedral, Kremlin (1929)
Spouse	Ivan III of Russia
Issue	Ivan Ivanovich
House	Rurik
Father	Boris of Tver
Religion	Russian Orthodox

Biography

When Vasili II, Ivan III's father, was getting ready to attack Dmitry Shemyaka, he found an ally in the person of Boris of Tver. The two decided to seal the alliance by arranging a betrothal between the future Ivan III and Maria of Tver in 1452.^[4] It appears that she died from poisoning in 1467. However, if one is to believe Joseph Volotsky, she had been suffering from "infirmity" since childhood. She gave birth to Ivan the Young in 1458.