August 1399 in history

Born in August 1399

Aug 12 Demetrius I Starshy the second eldest son of Algirdas, Grand Duke of Lithuania, and his first wife Maria of Vitebsk. He was Duke of Bryansk from 1356 to 1379 and from 1388 to 1399

Died in August 1399

Aug 12 Andrei of Polotsk the eldest son of Algirdas, Grand Duke of Lithuania, and his first wife Maria of Vitebsk. He was Duke of Pskov and Polotsk. As the eldest son of the Grand Duke, Andrei claimed his right to the throne after his father's death in 1377. Algirdas left Jogaila, his eldest son with his second wife Uliana of Tver, as the rightful heir. Andrei's rivalry with Jogaila, Grand Duke of Lithuania and later King of Poland, eventually led to his demise
Aug 12 Spytek of Melsztyn (died 1399) a Polish nobleman.
Aug 26 Mikhail II of Tver Grand Prince of Tver and briefly held the title of Grand Prince of Vladimir. He was one of only two Tver princes after 1317 to hold the grand princely title, which was almost the exclusive purview of the Muscovite princes