Duke of Gesvres

The Duke of Gesvres (Fr.: duc de Gesvres) was a title in the peerage of France from 1670 to 1794, named after Gesvres in northwestern France.

Background
The title of Baron of Gesvres first came to the Potier family with the marriage of Jacques Potier to Françoise Cueillette, daughter of Jean, seigneur de Freschines et de Gesvres. Their son, Louis Potier inherited this title. From 1608, however, Louis Potier was known as the Count of Tresmes, and his son, René Potier, succeeded in elevating the title to Duke of Tresmes. In 1670, René Potier's son Léon Potier (who became Duke of Tresmes in 1669) changed the name of the title to "Duke of Gesvres". Thereafter, the Dukes of Gesvres were sometimes known as the "Duke of Tresmes and Gesvres" and the eldest son of the Duke of Gesvres sometimes used the title "Duke of Tresmes" as a courtesy title and the younger sons sometimes used "Count of Tresmes". The title was abolished at the time of the French Revolution when the last Duke of Gesvres was guillotined.