Namesakes for PYOTR: Nobel Prize Winners: 1 physics (physics) Pyotr Kapitsa 1978 Grand Dukes and Tsars of Russia: 3 tsars Tsar Pyotr I the Great 1682-1725 Tsar Pyotr II 1727-1730 Tsar Pyotr III 1762 Notable Musicians: 1 composer (composer) Pyotr Ilyich Tchaikovsky 1840-1893