Duc de Beaumont was a French

French nobility

The French nobility was the privileged order of France in the Middle Ages and the Early Modern periods.In the political system of the Estates General, the nobility made up the Second Estate...

 Duke

Duke

A duke or duchess is a member of the nobility, historically of highest rank below the monarch, and historically controlling a duchy...

 (though not a peerage

Peerage of France

The Peerage of France was a distinction within the French nobility which appeared in the Middle Ages. It was abolished in 1789 during the French Revolution, but it reappeared in 1814 at the time of the Bourbon Restoration which followed the fall of the First French Empire...

) created by Letters Patent

Letters patent

Letters patent are a type of legal instrument in the form of a published written order issued by a monarch or president, generally granting an office, right, monopoly, title, or status to a person or corporation...

 in 1765.

The title, referring to Beaumont-du-Gâtinais

Beaumont-du-Gâtinais

Beaumont-du-Gâtinais is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.-External links:* * *...

 in the Île-de-France

Île-de-France (province)

The province of Île-de-France or Isle de France is an historical province of France, and the one at the centre of power during most of French history...

, 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. It became extinct on the death of the grantee's grandson Monseigneur Anne-Édouard-Louis-Joseph de Montmorency-Beaumont-Luxembourg, 3rd duc de Beaumont, 12th prince de Luxembourg, 10th prince de Tingry, pair de France, in 1878.

Ducs de Beaumont (1765)

• Charles-François-Henri de Montmorency-Luxembourg, duc de Beaumont (1713 – 1787)
• Anne-Christian de Montmorency-Luxembourg, duc de Beaumont (1767 – 1821)
• Anne-Edouard-Louis-Joseph de Montmorency-Beaumont-Luxembourg, duc de Beaumont (1802 – 1878)

Sources

• http://www.heraldica.org/topics/france/peerage2.htm
• http://genealogy.euweb.cz/morency/morency5.html