François Casimir Dudevant (6 July 1795 – 8 March 1871) was the illegitimate son of Baron Jean-François Dudevant (1754–1826), a French military officer, and his mistress Augustine Soulé.
On 10 December 1822, Dudevant married Aurore Dupin, who became well known as an author using the name George Sand. Before separating in 1830, they had two children: Maurice (1823–1889) and Solange (1828–1899), who married the artist Auguste Clésinger in 1847.
Jean-François-Maurice-Arnauld Dudevant, known as Baron Dudevant but better known by the pseudonym Maurice Sand (30 June 1823 – 4 September 1889), was a French writer, artist and entomologist. He studied art under Eugène Delacroix and also experimented in various other subjects, including geology and biology.
He was the elder child and only son of George Sand, a French novelist and feminist, and her husband, Baron François Casimir Dudevant. In addition to his numerous novels, he is best remembered for his monumental study of commedia dell'arte – Masques et bouffons (comédie italienne), 1860.