Pietro Carnesecchi was an Italian humanist.

Pietro Chiari was an Italian catholic priest, playwright, novelist and librettist.

Pietro Citati was an Italian writer and literary critic.

Pietro Colletta was a Neapolitan general and historian, entered the Neapolitan artillery in 1796 and took part in the campaign against the French in 1798.

Pietro Cossa (25 January 1830 – 30 August 1881) was an Italian dramatist.

Pietro d'Abano, also known as Petrus de Apono, Petrus Aponensis or Peter of Abano, was an Italian philosopher, astrologer, and professor of medicine in Padua. He was born in the Italian town from which he takes his name, now Abano Terme. He gained fame by writing Conciliator Differentiarum, quae inter Philosophos et Medicos Versantur. He was eventually accused of heresy and atheism, and came before the Inquisition. He died in prison in 1315 before the end of his trial.

Pietro Fanfani was an Italian philologist, humorist and novelist.

Pietro Garinei was an Italian playwright, actor, and songwriter. Brother of Enzo Garinei.

Pietro Giannone was an Italian philosopher, historian and jurist born in Ischitella, in the province of Foggia. He opposed the papal influence in Naples, for which he was excommunicated and imprisoned for twelve years until his death.

Pietro Giordani was an Italian writer, classical literary scholar, and a close friend of, and influence on, Giacomo Leopardi.