Pierre-Louis Panet (1761–1812), Canadian lawyer, notary, seigneur, judge and political figure in Lower Canada
Pierre Louis Parisis (1795–1866), the Roman Catholic bishop of the Bishopric of Langres from 1835 to 1851
Pierre Louis Prieur (1756–1827), French lawyer elected to the Estates-General of 1789
Pierre Louis Roederer (1754–1835), French politician, economist, and historian, politically active in the era of the French Revolution and First French Republic
Pierre Louis Rouillard (1820–1881), French sculptor known for his sculptures of animals
Pierre Louis de Saffon (1724–1784), French duelist that escaped to exile in the Dutch colony of Demerara, becoming a wealthy landowner