On 18 August 1831 Murat married Caroline Georgina Fraser (1810–1879) in Bordentown, New Jersey. Caroline, a Protestant, was born in Charleston, South Carolina, daughter of Thomas Fraser, a Scottish emigrant to the United States and major in the Loyalist militia during the American Revolution, and his wife Ann Loughton (née Smith) Fraser.[5] Together, they lived in Bordentown for several years,[12] and were the parents of:[6]
Princess Caroline Laetitia Murat (1832–1902), who married Charles, Baron de Chassiron in Paris in 1850. After his death in 1871, she married John Lewis Garden (1833–1892) of Redisham Hall in London in 1871.
Joachim Joseph Napoléon Murat, 4th Prince Murat, 3rd Prince of Pontecorvo (1834–1901), a Major-General of the French Army who married Malcy Louise Caroline Berthier de Wagram (1832–1884), a daughter of Napoléon Alexandre Berthier, 2nd Prince of Wagram (1810–1887), at the Tuileries Palace in 1854. After her death in 1884, he married Lady Lydia Hervey (1841–1901) in Paris in 1894.[7]
Princess Anne Murat (1841–1924), who married Antoine, 6th Duc de Mouchy, 6th Prince-Duc de Poix (1841–1909) in Paris in 1865.[13]
Prince Charles Louis Napoléon Achille Murat (1847–1895),[14] who married Princess Salomé Dadiani of Mingrelia (1848–1913) in Paris in 1868.[14]
Prince Louis Napoléon Murat (1851–1912), who married Eudoxia Mikhailovna Somova (1850–1924), a relative of Orest Somov, in Odessa in 1873. She was a widow of Prince Orbeliani.[15]
Napoléon Lucien Murat died on 10 April 1878 in Paris.[6] His wife died shortly after him on 10 February 1879 in their Paris apartment, 80 Boulevard Malesherbes, 8th arrondissement