Namesakes
Fictional Characters from Books:
1 character, 1 hero
Petya Rostov 1869 War and Peace 
Pierre Bezukhov (a.k.a. Pyotr) 1869 War and Peace
Nobel Prize Winners:
1 physics
(physics) Pyotr Kapitsa 1978
Notable Activists and Revolutionaries:
1 political activist
(political activist) Pyotr Kropotkin 1842-1921
Notable Actors and Entertainers:
1 actor
Petr Shelokhonov (a.k.a. Pyotr) 1929-1999
Notable Musicians:
1 composer
Pyotr Ilyich Tchaikovsky 1840-1893
Notable Philosophers and Thinkers:
1 economist
Pyotr Kropotkin 1842-1921
Notable Scientists and Inventors:
1 physicist
Pyotr Kapitsa 1894-1984
Olympic Medalists:
1 bronze, 1 gold, 1 silver
(bronze) Pyotr Breus 1956 water polo
(gold) Pyotr Bolotnikov 1960 10000 m
(silver) Pyotr Pochynchuk 1980 20 km walk
Russian Grand Dukes and Tsars:
3 tsars
Tsar Pyotr I the Great 1682-1725
Tsar Pyotr II 1727-1730
Tsar Pyotr III 1762