About Charles Constance César Joseph Matthieu d'Agoult
Charles Constance César Joseph Matthieu d'Agoult de Bonneval (1747 in Grenoble– 1824 in Paris) was a French Roman Catholic bishop, and after his resignation of his diocese a political writer.
His eldest brother, François-Edouard-Augustin-Venceslas-Hippolyte, Marquis d'Agoult, was Maréchal-de-Camp in the royal army.
Another brother, Antoine-Jean, Vicomte d'Agoult, held the rank of Mestre-de-camp, and was a Commander in the Order of Saint Lazare.
Another brother, Louis-Annibale, was also a Maréchal-de-Camp.