Lucien Bonaparte (Ajaccio, 21 May 1775–29 June 1840) was the third son of Letizia Ramolino and Carlo Mario Buonaparte, and therefore Napoleon’s younger brother.
As young man he became connected to Pasquale Paoli, the Corsican politician who led the struggle for the island’s independence, and then participated in the French Revolution, carving out a place of prominence for himself in the political scene of those years, leading to his nomination in 1799 to the post of President of the Council of Five Hundred. In this role he facilitated his brother’s taking of power and Napoleon named him Minister of the Interior and then Ambassador to Madrid.
His association with Napoleon would break when Lucien, his first wife, Christine Boyer, having died, decided to marry Alexandrine de Bleschamp, with whom he would have nine children: forced into exile as a result, he settled in Rome in 1804 and was nominated by Pius VII prince of Canino.
He did not reconcile with his brother until the eve of the One Hundred Days.