Pyotr Kirillovich Koshevoy was a Soviet military commander and a Marshal of the Soviet Union.

Prince Pyotr Borisovich Kozlovsky was a Russian diplomat and a man of letters.

Pyotr Nikolayevich Krasnov, also known as Peter Krasnov, was a Russian military leader.

Pyotr Nikolayevich Kudryavtsev was a Russian writer, historian, pedagogue, literary critic, philologist and journalist who in 1856-1858 was the head of Russky Vestnik's political review section.

Pyotr Lavrovich Lavrov was a prominent Russian theorist of narodism, philosopher, publicist, revolutionary, sociologist, and historian.

Pyotr Nikolaevich Lebedev was a Russian physicist. His name was also transliterated as Peter Lebedew and Peter Lebedev. Lebedev was the creator of first scientific school in Russia.

Pyotr Nikolayevich Mamonov was a Russian rock musician and the frontman of the Moscow band Zvuki Mu.

Pyotr Alekseyevich Morgunov was an officer of the Soviet Navy. He worked in the navy's coastal defence branch and reached the rank of Lieutenant General.

Pyotr Ivanovich Nechayev was a Russian religious writer, journalist, editor and pedagogue, a senior lecturer at the Saint Petersburg Theological Academy.

Pyotr Mikhaylovich Nevezhin was a Russian dramatist and short story writer.