Duc de Beaumont was a French Duke (though not a peerage) created by Letters Patent in 1765.
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The title, referring to Beaumont-du-Gâtinais in the Île-de-France, was created for Monseigneur Charles-François-Christian de Montmorency-Luxembourg, son of Christian-Louis, prince de Tingry (third son of François-Henri de Montmorency, duc de Luxembourg) and his wife Louise-Madeleine de Harlay, comtesse de Beaumont.
Beaumont, Texas | Beaumont | Beaumont-le-Roger | Bar-le-Duc | Roger de Beaumont | Louis de Rouvroy, duc de Saint-Simon | Beaumont-sur-Oise | William Beaumont | Sir George Beaumont, 7th Baronet | Charles de Sainte-Maure, duc de Montausier | Mark Beaumont | Hugues-Bernard Maret, duc de Bassano | Hugh Beaumont | Eugène Viollet-le-Duc | Duc de La Rochefoucauld | Charles Beaumont | Bill Beaumont | Beaumont, Puy-de-Dôme | Beaumont College | Michel Duc-Goninaz | Hugh Beaumont (actor) | Hénin-Beaumont | Étienne François, duc de Choiseul | Claude Victor-Perrin, Duc de Belluno | Christophe de Beaumont | Beaumont Tower | Beaumont Newhall | Beaumont Hospital | Beaumont and Fletcher | William Beaumont Army Medical Center |