Jean Guillanme Hyde De Neuville, baron, a French politician of Scottish descent, born at La Charite-sur-Loire, Jan. 24, 1776, died in Paris, May 28, 1857. He was one of the most active agents of the Bourbons after the death of Louis XVI., and mingled in nearly all the intrigues for the subversion of the revolutionary governments. After the 18th Brumaire, in an interview with Bonaparte, he tried to persuade him to restore the Bourbons. He was charged by Fouche with being an accomplice in the infernal machine plot, but cleared himself from the accusation. He subsequently removed to the United States, settled in the vicinity of New York, became acquainted there with Gen. Moreau, then an exile, and is said to have been instrumental in persuading him to return to Europe. Early in 1814 he returned to France, and was welcomed by the Bourbons, who had just been reinstated on the throne. He was engaged in all the negotiations and transactions which took place during 1814 and 1815, and on the second restoration was elected by his native department a deputy to the chambre in-trouvable, where he was an uncompromising advocate of the most reactionary measures.
In 1816 he was appointed minister plenipotentiary to the United States, and held that office till 1821, when, after being created a baron, he was recalled to France. Being ambassador at Lisbon in 1824, he cooperated in restoring to power the old king John VI., whom his son Dom Miguel had imprisoned. Thenceforth he gradually estranged himself from the ultra-royalist party. In 1828 he entered the Mar-tignac cabinet as minister of the navy, made several improvements in the colonial system, enforced measures against the African slave trade, and favored the independence of Greece. On the breaking out of the revolution of 1830, he asserted the claims of the duke of Bordeaux to the throne, in the chamber of deputies, and resigned his seat on Louis Philippe being selected. From that period he devoted himself mainly to agriculture.