Duke of Mercœur

The line became extinct in the 14th century, and passed by inheritance to the dauphins of Auvergne, counts of Clermont.

In 1426 it passed to the Bourbons by the marriage, of Jeanne de Clermont, dauphine of Auvergne, to Louis I, Count of Montpensier.

It formed part of the confiscated estates of the Constable de Bourbon, and was given by Francis I and Louise of Savoy to Antoine, Duke of Lorraine, and his wife, Renée of Bourbon, sister of the Constable.

His son Philippe Emmanuel left a daughter, who married the duc de Vendôme in 1609.

In 1773, it was re-created for Charles, Count of Artois, but was exchanged in 1778 for Poitou.