Charles Constance César Joseph Matthieu d'Agoult

Charles Constance César Joseph Matthieu d'Agoult de Bonneval (1747/1749, Grenoble – 1824, Paris), also known as Charles-César-Louis Loup Constance Joseph Mathieu d’Agoult de Bonneval, 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.