Pierre-Napoléon Bonaparte (11 October 1815 - 7 April 1881) was born in Rome, Italy, the son of Lucien Bonaparte and his second wife Alexandrine de Bleschamp.
He was a nephew of Joseph Bonaparte, Napoleon I of France, Elisa Bonaparte, Louis Bonaparte, Pauline Bonaparte, Caroline Bonaparte and Jérôme Bonaparte.
He began his life of adventure at the age of fifteen, joining the insurrectionary bands in the Romagna (1830 . errs. 1831); was then in the United States, where he went to join his uncle Joseph, and in Colombia with Francisco de Paula Santander (1832). Returning to Rome he was taken prisoner by order of Pope Gregory XVI (1835-1836). He finally took refuge in the United Kingdom of Great Britain and Ireland.
At the revolution of 1848 he returned to France and was elected deputy for Corsica to the Constituent Assembly. He declared himself an out-and-out republican and voted even with the socialists. He pronounced himself in favour of the national workshops and against the loi Falloux. His attitude contributed greatly to give popular confidence to his cousin Louis Napoleon (Napoleon III of France), of whose coup d'etat on 2 December 1851 he disapproved; but he was soon reconciled to the emperor, and accepted the title of prince. The republicans at once abandoned him.
From that time on he led a debauched life, and lost all political importance. He turned to literature and published some mediocre poems. In January 1870 a violent incident brought him again into prominence. As the result of a controversy with Paschal Grousset, the latter sent him two journalists as witnesses to set the terms of a duel. Pierre Bonaparte took them personally to account, and during a violent discussion he drew his revolver and killed one of them, Victor Noir. This crime greatly excited the republican press, which demanded his trial. The High Court acquitted him, and criticism then fell upon the government.
Pierre Bonaparte died in obscurity at Versailles. He is interred in the Cimetière des Gonards in Versailles.
On 22 March 1853, Pierre married the daughter of a Paris working-man, Justine Eleanore Ruflin, by whom he had two children: