Alexandre Louis Philippe Marie Berthier, 4th Prince of Wagram
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Alexandre Louis Philippe Marie Berthier (July 20, 1883, Paris – May 30, 1918, Barenton-sur-Serre; 4th Prince de Wagram) was the son of Bertha Clara von Rothschild of the German branch of the prominent Rothschild family and Louis Philippe Marie Alexandre Berthier, 3rd Prince de Wagram (1836–1911). The family resided in the ancestral home, the Château de Grosbois, a large estate in Boissy-Saint-Léger, southeast of Paris.
Through a relationship with Marie-Louise Salivas dite Welson, he had a daughter, Monique Berthier de Wagram (1914–2000). Alexandre Berthier had not yet married when he was killed in action at Barenton-sur-Cere during World War I. As such, the title became extinct. His daughter, though married three times (to two men), had no children, and so Alexander Berthier has no living descendants.