Yaroslav II of Vladimir

Yaroslav II of Vladimir (8 February 1191 – 30 September 1246) was the from 1238 to his death, and the father of Alexander Nevsky. His rule marked the restoration of after its invasion by the Mongols.

During a meeting with in 1246, he was poisoned by the Khan's mother,, and died a week later. This caused his son, Alexander Nevsky, to harbor a deep grudge against the Mongols, resulting in him having Batu Khan murdered out of revenge.

Reference
Assassin's Creed: Memories