Vytautas the Great
Vytautas the Great (; also known as Alexander c. 1350 – 27 October 1430) was a ruler of the Grand Duchy of Lithuania, first as regent for his cousin Jogaila (1392–1401) and then as the Grand Duke alongside him (1401–1430). He was also the prince of Grodno (1370–1382) and the prince of Lutsk (1387–1389), as well claimant to the titles of King of the Hussites and King of Lithuania.