Marc de Beauvau, 5th Prince of Beauvau

[1] His maternal grandparents were Antoine-César de Choiseul-Praslin [fr], 3rd Duke of Choiseul-Praslin, and Lady Antoinette O'Brien (a daughter of Charles O'Brien, 8th Earl of Thomond).

He had a well known stable and was one of the most active members of the Jockey Club de Paris.

He was known to joins the votes of the opposition, draws closer to the centre-left and signs the "Interpellation of the 116".

Upon the death of his father in 1864, he became Prince of Beauvau as well as inheriting the Château de Sainte-Assise in Seine-Port in the Seine-et-Marne department, where he entertained his numerous relatives.

Before her death in 1862, they were the parents of three daughters:[1] After the death of his first wife in 1862, he remarried on 30 September 1875 to Marie Adèle de Gontaut-Biron (1848–1938), a daughter of Elie de Gontaut-Biron, Viscount of Gontaut-Biron, Ambassador to Berlin, and Augustine de L'Espinay.