Guiscard (marquisate of)

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The Marquisate of Guiscard is a fiefdom that was established as a result of the marriage of the Duke of Valentinois (the future Prince Honoré IV) to Louise d'Aumont-Mazarin in 1777.

See also

Chilly (marquisate of)

Mayenne (earldom of)

Longjumeau (earldom of)

Château-Porcien (Principality of)

Massy (barony of)

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