Adolphe Louis Marie, vicomte de Ségur-Lamoignon (Paris, 31 August 1800 - Château de Méry-sur-Oise, 30 November 1876), married 15 October 1823 Marie Louise Augustine Félicité de Lamoignon (Paris, 18 December 1805 - Paris, 18 February 1860), without issue
Raymond Jean Paul, comte de Ségur d' Aguesseau (Paris, 18 February 1803 - Château d' Oléac, Hautes-Pyrénées, 13 February 1889), married firstly Rome, 5 February 1825 Nadine Schwetchine-Luz-St-Sauveur (? - 15 July 1836), and had three children, and married secondly 20 April 1845 Valentine, Princess Lubomirska (12 March 1817 - Château d' Oléac, Hautes-Pyrénées, 31 January 1889), and had six children