Born in Paris, son of Henri François, comte de Ségur, and his wife Philippe Angélique de Froissy, he was appointed to the command of an infantry regiment at eighteen, and served under his father in Italy and Bohemia.
Henri Matisse | François Mitterrand | François Truffaut | Claude François | François Villon | Henri de la Tour d'Auvergne, Vicomte de Turenne | François Rabelais | François Hollande | Franche-Comté | Bernard-Henri Lévy | Henri Dutilleux | Jean-François Lyotard | Paul-Henri Mathieu | Jean-François Millet | François-René de Chateaubriand | Henri Poincaré | François Boucher | Robert Henri | Henri Mignet | Henri Cartier-Bresson | François Fénelon | comte | Henri Fayol | François Tombalbaye | François de La Rochefoucauld (writer) | Charles François Dumouriez | Henri Bendel | Henri Barbusse | François Mauriac | Comte de Lautréamont |
His first cousin was Nicolas-Alexandre, marquis de Ségur and other relatives include Henri IV, vicomte de Ségur, leader and nobleman, becoming Duke in France and England, and Marguerite de Ségur, HRH Albert, Prince Consort's great-grandmother, also Queen Victoria's great-grandmother making Prince Albert and Queen Victoria second if not first cousins, part of Marquessate.
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He was made governor of the County of Foix from 1737 until 1751, when he was succeeded by his son, and was made a Knight in the Ordre du Saint-Esprit on 2 February 1748.
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He was the son of Henri Joseph, comte de Ségur (1661–1737), military commander and duke, and Claude Élisabeth Binet and paternal grandson of Jean-Isaac, marquis de Ségur (d. 1707), military commander and a descendant of François de Ségur, seigneur de Sainte-Aulaye (d. 1605).
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Philippe Henri, marquis de Ségur (Paris, 20 January 1724 - Paris, 3 October 1801), marshal of France in 1783, twin with the below
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Henri François, comte de Ségur, baron de Romainville et de Ponchat, seigneur de Fougueyrolles (1 June 1689 – 18 June 1751) was a French general.