Vasilii Davidovich Groznii

Vasili (died 1345) was the ruling prince of the principality of Yaroslavl from 1321 to 1345. Some sources refer to him as Vasili Davidovich, others as Vasili Mikhailovich. He was nicknamed "Horrible Eyes" (Russian: Грозные Очи, "Groznye Ochi").

Vasili ruled the principality of Yaroslavl at a time when Moscow was expanding and seeking supremacy over other principalities in northeastern Russia. He succeeded Duke David, who was made a saint of the Russian Orthodox Church.

Genealogical sources give conflicting accounts of his paternity, so the patronymic is not clearly known. However, it is clear that he was a direct male-line descendant of Saint Theodore the Black, duke of Mozhajsk (d. 1298). He was either his grandson or great-grandson, but not his son.

Some standard works, including Schwennicke's Europäische Stammtafeln volume II, identify Vasili as a son or grandson of Mikhail Fedorovich (born in the 1260s; died in the 1280s), the eldest son of Saint Theodore the Black. However, some Russian genealogies say that he was a son of his predecessor, Duke David Fedorovich (the saint), a younger son of Saint Theodore the Black.

In or around the 1330s, duke Vasili married Evdokia, a daughter of Ivan Kalita, Grand Prince of Moscow. However, the new son-in-law did not acknowledge the overlordship of Moscow, but instead willfully called himself the Grand Prince of Yaroslavl.

Ivan Kalita's priority at that time was to break the power of Tver, which was a serious contender to Moscow. In 1339 Khan Uzbek summoned to the Golden Horde two princes who opposed Ivan Kalita's demands: Alexander Mikhailovich of Tver and Vasili of Yaroslavl. Ivan Kalita feared that joint action by these princes would cause trouble for him. Prince Romanchuk of Belozero was a third there. A detachment of 500 men were sent to seize Vasili, but he escaped with his men and reached the Horde safely. In the end, though, Kalita's opponents failed to shake Khan Uzbek's confidence in the Moscow ruler.

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