Anastasia of Smolensk, Fyodor Yuryevich Yury Svyatoslavich (Russian: Юрий Святославович) or Georgy Svyatoslavovich (Russian: Георгий Святославович; died 1407) was the prince of Smolensk and Bryansk (1386–1395; 1401–1404) whose life was spent in vain attempts to fend off aggression by the Grand Duchy of Lithuania.

In 1395, while Yury was visiting his father-in-law, Oleg II of Ryazan, Grand Duke of Lithuania Vytautas the Great took Smolensk and installed his governor there.

In 1401, Yury and Oleg made use of his plight to retake Smolensk and Bryansk, where the pro-Lithuanian boyars were promptly executed.

As Vasily was eager to accuse Yury of shortsightedness, the latter left Moscow and proceeded with his son to Novgorod, where he was treated honourably and was given an appanage of thirteen towns, including Porkhov and Tiversk.

When she refused his advances, Yury killed her and her husband and, afraid of the imminent punishment, fled to the Golden Horde, where he died soon thereafter, in 1407.