| Eugène-Alexandre de Montmorency-Laval | |
| Duke of Laval Marquis of Montmorency | |
| Birth Name: | Eugène-Alexandre de Montmorency-Laval |
| Birth Date: | 20 July 1773 |
| House: | House of Montmorency House of Laval |
| Father: | Anne-Alexandre-Marie de Montmorency-Laval |
| Mother: | Marie Louise Mauricette de Montmorency-Luxembourg |
| Spouse: | |
Eugène-Alexandre de Montmorency-Laval, 4th Duke of Laval (20 July 1773 – 2 April 1851), was a 19th-century French soldier.
Eugène-Alexandre was born on 20 July 1773.[1] He was the fourth son of Anne-Alexandre-Marie de Montmorency-Laval, 2nd Duke of Laval, and Marie-Louise de Montmorency-Luxembourg (1750–1829), a daughter of Count Joseph Maurice Annibal de Montmorency-Luxembourg. Among his siblings were elder brother, Anne-Adrien-Pierre de Montmorency-Laval, the French ambassador to the United Kingdom.[2]
His paternal grandparents were Guy André Pierre de Montmorency-Laval, 1st Duke of Laval, and Jacqueline de Bullion de Fervaques.[3]
Like his elder brother Achille (who died of a wound he received in the defense of Bundenthal), he fought in the campaigns of 1793, 1794 and 1795, in the Army of Condé. Returning to France, he became a member of the right-wing royalist organisation known as the Chevaliers de la Foi (Knights of Faith).[4]
He became Marshal of the King's Camps and Armies and a Knight of the Royal and Military Order of Saint-Louis, before he was promoted to Lieutenant-General of the Armies.[1]
In 1837, he inherited the title of Duke of Laval from his brother Anne-Adrien-Pierre. Before that, he was called the Marquis of Montmorency.[1]
In 1802, he married Maximilienne de Béthune-Sully (1772–1833), widow of the Count of Chârost, heiress to the Château de Beaumesnil. Having vowed to have a chapel built there if the Bourbons returned to power, they kept their word on the accession of King Louis XVIII and the chapel was consecrated in 1820.[1]
After the death of his first wife, he married Françoise Xavière Nicole Constance de Maistre (1793–1882) on 26 November 1833 in Genoa. She was a daughter of Joseph de Maistre, Count of Maistre, a philosopher who was the author of the St Petersburg Dialogues.[5]
The Duke died, without issue, on 2 April 1851, upon which the dukedom of Laval became extinct. He left the Château de Beaumesnil to his brother-in-law, Rodolphe de Maistre, Count of Maistre.[6]