The Riquet family is originally from Languedoc (Béziers). They were ennobled by King Louis XIV on 20 November 1666 when Pierre-Paul Riquet, the engineer responsible for the construction of the Canal du Midi, was created Baron of Bonrepos (French: Baron de Bonrepos) in the Haute-Garonnedepartment in southwestern France.[2] On 5 August 1670, Baron Riquet acquired the County of Caraman, also in Haute-Garonne, from Paul d'Escoubleau, Marquis of Sourdis, for his second son, Pierre-Paul II Riquet, who became the Count of Caraman (French: Comte de Caraman). As Pierre-Paul II died unmarried without issue, he transferred, by deed of cession, the County of Caraman to his nephew, Victor François de Riquet de Caraman (the eldest son of his late brother), in 1722.[3]
The youngest son of the 3rd Count (and younger brother to the 1st Duke of Caraman), François-Joseph-Philippe de Riquet (1771–1843), became the 16th Prince of Chimay on 24 July 1804 following the death of his childless maternal uncle, Philippe Gabriel Maurice Joseph de Hénin-Liétard, 15th Prince of Chimay.[5] His son, Joseph de Riquet de Caraman, was created Prince of Caraman in the Dutch nobility in 1824 (he succeeded his father as the 17th Prince of Chimay in 1843).[1]