| François de Cossé | |
| Full Name: | Anne Marie Timoléon François de Cossé |
| Birth Date: | 12 February 1868 |
| Birth Place: | Paris, France |
| Death Date: | 1944 |
| 11th Duke of Brissac | |
| Spouse: | Mathilde Renée de Crussol |
| Issue: | Pierre de Cossé Brissac |
| Father: | Roland de Cossé |
| Mother: | Jeanne Marie Say |
Anne Marie Timoléon François de Cossé, 11th Duke of Brissac (1868–1944), was a French aristocrat and author. He held the French noble title of Duke of Brissac from 1883 to 1944 and was educated at the École militaire de Saint-Cyr.
He was born on 12 February 1868 in Paris, France.[1] His maternal grandfather, Louis Say, was the founder of the Say sugar empire (now known as Béghin-Say, a subsidiary of Tereos). His maternal granduncle, Jean-Baptiste Say, was a classical liberal economist.
He graduated from the École spéciale militaire de Saint-Cyr, a military academy in Brittany, France.[1] He wrote a historical book about the Austrian court, titled Un Carrousel à la cour d'Autriche.[1] In 1894, he wrote a second book, based on his memories about the army.[1]
He married Mathilde Renée de Crussol d'Uzès (1875-1908), the daughter of the 12th Duke of Uzès and Anne de Rochechouart de Mortemart, on 4 November 1894.[1] They resided at the Château de Brissac in Brissac-Quincé, Maine-et-Loire, France.
He died in 1944.[1] He was succeeded as Duke of Brissac by his son, Pierre de Cossé Brissac.