1911 Encyclopædia Britannica/Penthièvre, Counts of
PENTHIÈVRE, COUNTS OF. In the 11th and 12th Centuries the count ship of Penthiévre in Brittany (dep. of Cotes-du-Nord) belonged to a branch of the sovereign house of Brittany. Henry d'Avaugour, heir of this dynasty, was dispossessed of the count ship in 1235 by the duke of Brittany, Pierre Mauclerc, who gave it as dowry to his daughter, Yolande, on her marriage in 1238 to Hugh of Lusignan, count of La Marche. Duke John I. of Brittany, Yolaude's brother, seized the count ship on her death in 1272. In 1337 Ioan of Brittany brought Penthievre to her husband, Charles de Chatillon-Blois. In 1437 Nicole de Blois, a descendant of this family, married lean de Brosse, and was deprived of Penthievre by the duke of Brittany, Francis II., in 1465. The count ship, which was restored to Sebastian of Luxemburg, heir of the Brosses through his mother, was erected for him into a duchy in the peerage of France (duché-pains) in 1569, and was afterwards held by the duchess of Mercoeur, daughter of the first duke of Penthievre, and then by her daughter, the duchess of Vendome. The duchess of Vendome's grandson, Louis ]osepl1, inherited Penthievre in 1669, but it was taken from him by decree in 1687 and adjudged to Anne Marie de Bourbon, princess of Conti. In 1696 it was sold to the count of Toulouse, whose son bore the title of duke of Penthievre. This title passed by inheritance to the house of Orleans.