In 1790, during the French Revolution, Albert Louis de Pouilly (1731–1795) emigrated with his family. His sons Albert and Emmanuel changed the family name to Mensdorff-Pouilly, which refers to a village in the county of Roussy in Luxembourg.[1]
The princely branch of the family died out in the male line upon the death in 1964 of Alexander, 3rd Prince von Dietrichstein zu Nikolsburg, but the comital line continues to exist. The family motto is Fortitudine et caritate.