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Counts and dukes of Penthièvre

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Title: Counts and dukes of Penthièvre  
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Subject: Charles I, Duke of Brittany, Conan IV, Duke of Brittany, Counts of Penthièvre, Pierre Dubois Davaugour, Antoine de Beauterne
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Counts and dukes of Penthièvre

In the 11th and 12th centuries the Countship of Penthièvre (Breton: Penteur) in Brittany (now in the department of Côtes-d'Armor) belonged to a branch of the sovereign House of Brittany. It initially belonged to the House of Rennes. Geoffrey I, Duke of Brittany, gave it to his brother Eudes in 1035, and his descendants formed a cadet branch of the ducal house.

The geographical region of Brittany that constituted the holdings of Penthièvre correlate closely with the territories that constituted the early Breton kingdom of Domnonée.

The history of the title Count of Penthièvre included frequent dispossessions and restorations. Henri d'Avaugour, heir of this family, was dispossessed of the countship in 1235. The Duke of Brittany, Pierre Mauclerc, founder of the Breton House of Dreux, gave it as dowry to his daughter, Yolande, on her marriage in 1238 to Hugh XI of Lusignan, Count of La Marche. John I, Duke of Brittany, Yolande's brother, seized the countship on her death in 1272. After the Breton War of Succession the title was dispossessed twice by the reigning Dukes of Brittany, once by John VI and another time by Francis II.


  • Disputed Heirs to the Ducal Crown of Brittany 1
  • As Dukes of Penthièvre 2
  • Later dukes from various houses 3
  • Counts of Penthièvre 4
    • House de Rennes 4.1
      • Lords of Avaugour 4.1.1
    • Capetian House of Dreux 4.2
    • House of Blois-Châtillon 4.3
    • House of Brosse 4.4
  • Dukes of Penthièvre 5
    • House of Luxembourg 5.1
    • House of Lorraine 5.2
    • House of Bourbon-Vendôme 5.3
    • House of Bourbon-Penthièvre 5.4
    • House of Orléans 5.5
      • Second Restoration 5.5.1
      • July Monarchy 5.5.2
  • References 6
  • See also 7

Disputed Heirs to the Ducal Crown of Brittany

In 1337 Joan the Lame, Duchess of Brittany, brought Penthièvre to her husband, Charles de Châtillon, Count of Blois. Joan was the daughter of Guy de Penthièvre, the brother of John III.

When John III died a dispute emerged regarding the inheritance of the Duchy of Brittany. John III had tried to prevent the inheritance of the Duchy by his half brother John of Montfort. Joanna and Charles claimed the Ducal crown and were subsequently proclaimed the Duchess and Duke of Brittany, which John of Montfort also claimed. Their dispute prompted the Breton War of Succession. In 1352, during that war, the Estates of Brittany were established. In 1364, Joan and Charles lost the Breton civil war decisively; while they lost the duchy, they were permitted to keep Penthièvre, and Joan was permitted to keep the empty title Duchess of Brittany until her death.

Under the Treaty of Guerande Joanna was permitted to retain the title Duchess of Brittany as a titulary and she recognized John V, John of Montfort's son as the undisputed Duke. When John V, Duke of Brittany went into exile in England in 1373, Charles V of France named his brother Louis, Duke of Anjou lieutenant-general of Brittany. Louis was also a son-in-law of Joanna de Penthièvre. Under the Treaties of Guerande (1365 and 1381) in the event the House of Montfort failed to produce a male heir to the Duchy of Brittany, the senior male heir of Joanna would be recognized as Duke. (This provision of the treaty was never activated; the House of Montfort would eventually merge the ducal crown into the crown of France.)

Joanna died in 1384 and left Penthièvre to her oldest son, Jean de Blois (1340-1404). In turn, Jean de Blois left Penthièvre to his son, Olivier (1389-1433). who would forfeit it to the Duke of Brittany in 1420.

In 1420, Duke John the Wise was kidnapped by the Dowager Countess of Penthièvre, the wife of Jean de Blois, and her son Olivier. John's wife, Joan of France, besieged the rebels and set free her husband. The freed Duke confiscated the Penthièvres' goods.

Olivier and his brother Jean de Blois (1393-1454) died childless, passing the recovered countship to Nicole de Blois (1424-1480), daughter of their brother Charles, seigneur of Avaugour (1396-1434).

In 1437 Nicole married Jean II de Brosse. She was deprived of Penthièvre by Francis II, Duke of Brittany in 1465 - thus undermining the Penthièvre family's position in the country. In 1488, at the death of the last Breton duke, Francis II, the head of the Penthièvre family was Jean de Brosse (died 1502), grandson of Nicole de Blois, who asserted his family's claim to the duchy, but Francis' daughter Anne succeeded.

As Dukes of Penthièvre

The countship of Penthièvre was restored to Sebastian of Luxemburg, heir of the Brosse family through his mother, Charlotte de Brosse (1506-1540), great-granddaughter of Nicole de Blois through her son Jean (d. 1502) and grandson Rene (1470-1524). The countship was erected for him into a duchy in the peerage of France in 1569. Afterwards it was held by Sebastian's daughter, Marie de Luxembourg, (1562-1623), who also became Duchess of Mercœur by marriage.

Nantes, proclaiming their young son, Philippe de Lorraine-Mercœur, (d. 1590), "prince and duke of Brittany". He allied with Spain and defeated Henry IV of France's attempts to subjugate Brittany until 20 March 1598 when Mercœur was forced to surrender and subsequently went in exile to Hungary. Philippe died young, leaving his sister, Françoise de Lorraine-Mercœur the duchy of Penthièvre.

Later dukes from various houses

The Duchess of Vendôme's grandson, Louis Joseph, duc de Vendôme, inherited Penthièvre in 1669, but it was taken from him by decree in 1687 and adjudged to Anne Marie de Bourbon, Princess de Princess de Conti. In 1696, it was sold to Louis-Alexandre de Bourbon, Count de Toulouse, whose son, Louis de Bourbon, bore the title Duke de Penthièvre. This title passed by inheritance to the House of Orléans.

Counts of Penthièvre

House de Rennes

  • Eudes (1035–1079), son of Geoffrey I, Duke of Brittany
  • Geoffrey I (1079–1093), son of Eudes
  • Stephen I (1093–1125), son of Eudes, brother of Geoffrey I
  • Geoffrey II (1125–1148), son of Stephen I
  • Rivallo (1148–1162), son of Geoffrey II
  • Stephen II (1162–1164), son of Rivallo
  • Geoffrey III (1164–1177), son of Geoffrey II, brother of Stephen II
  • Alan I (1177–1212), cousin of Geoffrey III, grandson of Stephen I through his son Henry, called Henry I
  • Henry II of Avagour (1212–1230), son of Alan I, was dispossessed of Penthièvre by Peter I, Duke of Brittany, who gave it to his daughter Yolande on her marriage to Hugh XI of Lusignan

Lords of Avaugour

  • Alan II (1230–1267), son of Henry II
  • Henry III (1267–1304), son of Alan II
  • Henry IV (1301–1334), son of Henry III
  • Joan (1334–1384), granddaughter of Henry IV

Capetian House of Dreux

House of Blois-Châtillon

  • John III (1384–1404), son of Joan; his widow would join in attempting the abduction and imprisonment of the duke of Brittany, only to be imprisoned herself by the duchess.
  • Olivier (1404–1433), son of John III - lost the countship and the rights of Penthièvre to the duke of Brittany after attempting his imprisonment in 1420, and presumed overthrow.
  • John IV (1433–1454), son of John III, brother of Olivier - some aspects of Penthièvre were restored.
  • Nicole (1454–1479), niece of John IV, married Jean II de Brosse

House of Brosse

  • John V (1454–1482), husband of Nicole, Count of Penthièvre jure uxoris
  • John VI (1482–1502), son of John V and Nicole
  • René (1502–1524), son of John VI
  • John VII (1524–1566), son of René

Dukes of Penthièvre

House of Luxembourg

House of Lorraine

House of Bourbon-Vendôme

House of Bourbon-Penthièvre

House of Orléans

Second Restoration

July Monarchy


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See also

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