Augustin-Gustave de Franquetot de Coigny

Augustin Louis Joseph Casimir Gustave de Franquetot, 3rd Duke of Coigny (4 September 1788 – 2 May 1865) was a French aristocrat and soldier.

While awaiting trial by the Chamber of Peers, the Duke committed suicide by arsenic.

Following the Teste–Cubières political corruption scandal revealed in May 1847, the affair only added to the popular discontent with the July Monarchy which culminated in the French Revolution of 1848.

[2] Three brothers from the Guillotte family bought the fiefdom of Franquetot, on the Cotentin Peninsula in Normandy, in 1528.

[3] In 1810, Franquetot kept a diary during his time on military service in Spain during the Napoleonic Wars.