Jérôme Phélypeaux (March 1674 – 8 February 1747), comte de Pontchartrain, was a French politician, son of Louis Phélypeaux.
He served as a councillor to the parlement of Paris from 1692, and served with his father as Secretary of State of the Maison du Roi and Navy Minster from 1699 onwards. His management of the French Navy was criticised, but recent historiography has reevaulated his contributions. He directed a significant programme of explorations and encouraged the settlement and development of Louisiana. He was responsible for the creation of the Académie des Inscriptions et Belles-Lettres. His first marriage, in 1697, was with Éléonore Christine de La Rochefoucauld de Roye (known as Mademoiselle de Chefboutonne) (1681–June 1708). Five children were born to this marriage:
- Marie Françoise Christine (1698–1701)
- Louis François (1700–1708), comte de Maurepas
- Jean Frédéric (1701–1781), comte de Maurepas, later comte de Pontchartrain
- Paul Jérôme (1703– ?), marquis de Chefboutonne, a soldier
- Charles Henri (1706–1734), bishop of Blois
He remarried in July 1713 with Hélène de L'Aubespine (1690–1770), with whom he had two daughters.
- Marie Louise (known as Rosalie), (1714–1780)
- Hélène Françoise Angélique (1715–1781), who married Louis-Jules Mancini-Mazarini, Duc de Nivernais
In 1715, with the death of Louis XIV and the assumption of power by the Regent, Phélypeaux was compelled to resign his ministries in favour of his son Jean-Frédéric. Effective authority, and later the guardianship of his children, passed to his kinsman Louis Phélypeaux, marquis de La Vrillière.
- Sara E. Chapman, Private Ambition and Political Alliances the Phélypeaux de Pontchartrain Family and Louis XVI's Government, 1650-1715. Rochester N.Y. : University of Rochester Press, 2004. ISBN 1580461530.
|Secretary of State for the Navy|
6 September 1699 - 1 October 1715
| Succeeded by|
Louis Alexandre de Bourbon, comte de Toulouse
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