Antonin Nompar De Canmont Lauzun, duke de, a French courtier, born about 1633, died Nov. 19, 1723. A poor nobleman from Gascony, he made his fortune at the French court by his elegant manners and wit and dauntless ambition, and became a favorite of many of the most eminent and beautiful women, and of Louis XIV., who appointed him to various offices. He was about to marry Mlle, de Mont-pensier, granddaughter of Henry IV., and to take the command of the French army in Flanders, when the intrigues of Louvois and Mme, de Montespan caused him to be detained in prison for many years. He finally recovered his liberty at the instance of the French princess, whom he is supposed to have secretly married. In 1688 he escorted the queen of James H. and her infant son to France, and in 1689 took an active part in the fruitless expedition to Ireland. Although he never fully recovered the good graces of the French monarch, he was raised to the rank of duke in 1692. Mlle, de Montpensier died in 1693, and in 1695, at the age of about 62, he married Mlle, de Durford, a girl of 16. Lauzun figures frequently in the French literature of the 17th century, and even of a later period, particularly in the works of Mme. de Sevigne, La Bruyere, and Saint Simon. - The Memoires du duc de Lauzun, of which various editions have appeared, and a new one by Lacour in Paris in 1858, do not refer to this Lauzun, but to a noted member of the Biron family. (See Biron, Armand Louis.)