Der Titel Duc de Saint-Aignan wird vom Hause Beauvillier geführt.
Der Reale Hintergrund:
- François-Honorat de Beauvillier (1607–1687), duke-peer of Saint-Aignan (1663–1679)
- Paul de Beauvillier (1648–1714), peer with the courtesy title of duke of Beauvillier (1679–1687) then duke-peer of Saint-Aignan (1679–1706)
- Paul-Hippolyte de Beauvillier (1684–1776), duke-peer of Saint-Aignan (1706–1738)
- Paul-François de Beauvillier (1710–1742), peer with the courtesy title of duke of Beauvillier (1738–1742)
- Paul-Louis de Beauvillier (1711–1757), peer with the courtesy title of duke of Beauvillier (1742–1757)
- Paul-Etienne de Beauvillier (1745–1771), peer with the courtesy title of duke of Beauvillier (1757–1771)
- Paul de Beauvillier (1766–1794), peer with the courtesy title of duke of Beauvillier (1771–1776) then duke-peer of Saint-Aignan (1776–1790)
- Raymond François de Beauvilliers (1790-1811) Son of Paul Marie Victoire de Beauvilliers
- Charles Paul François de Beauvilliers (1745-1828) Great nephew of Raymond François de Beauvilliers