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Biography of Francis Montfort I Duke Brittany 1414-1450

Paternal Family Tree: Capet

Maternal Family Tree: Tomasina Morosini

In August 1396 [his father] John Montfort V Duke Brittany (age 6) and [his mother] Joan Valois Duchess Brittany (age 5) were married. She by marriage Duchess Brittany 1341 War of Sucession. She the daughter of [his grandfather] Charles "Beloved Mad" VI King France (age 27) and [his grandmother] Isabeau Wittelsbach Queen Consort France (age 26). He the son of [his grandfather] John Montfort V Duke Brittany (age 57) and [his grandmother] Joanna of Navarre Queen Consort England (age 26). They were second cousins. He a great x 3 grandson of King Henry III of England. She a great x 5 granddaughter of King Henry III of England.

On 14th May 1414 Francis Montfort I Duke Brittany was born to [his father] John Montfort V Duke Brittany (age 24) and [his mother] Joan Valois Duchess Brittany (age 23). Coefficient of inbreeding 2.84%.

Before 4th August 1430 Philip Valois I Duke Brabant (age 26) and [his future wife] Yolande Valois Anjou Duchess Brabant Duchess Brittany (age 18) were married. She by marriage Duchess Brabant. She the daughter of King Louis of Naples and [his future mother-in-law] Yolande Barcelona Queen Consort Naples (age 48). He the son of Anthony Valois Duke Brabant and Jeanne Luxemburg Duchess Brabant. They were second cousins. He a great x 3 grandson of King Edward I of England. She a great x 5 granddaughter of King Henry III of England.

In August 1431 Francis Montfort I Duke Brittany (age 17) and Yolande Valois Anjou Duchess Brabant Duchess Brittany (age 19) were married. She by marriage Duchess Brittany. She the daughter of King Louis of Naples and Yolande Barcelona Queen Consort Naples (age 49). He the son of John Montfort V Duke Brittany (age 41) and Joan Valois Duchess Brittany (age 40). They were second cousin once removed. He a great x 4 grandson of King Henry III of England. She a great x 5 granddaughter of King Henry III of England.

On 27th September 1433 [his mother] Joan Valois Duchess Brittany (age 42) died.

On 12th November 1434 [his brother-in-law] Louis Valois Anjou III Duke Anjou (age 31) died. His brother [his brother-in-law] René (age 25) succeeded I Duke Anjou. Isabella Metz Duchess Anjou I Duchess Lorraine (age 34) by marriage Duchess Anjou.

In 1440 [his wife] Yolande Valois Anjou Duchess Brabant Duchess Brittany (age 28) died.

The History of William Marshal, Earl of Chepstow and Pembroke, Regent of England. Book 1 of 2, Lines 1-10152.

The History of William Marshal was commissioned by his son shortly after William’s death in 1219 to celebrate the Marshal’s remarkable life; it is an authentic, contemporary voice. The manuscript was discovered in 1861 by French historian Paul Meyer. Meyer published the manuscript in its original Anglo-French in 1891 in two books. This book is a line by line translation of the first of Meyer’s books; lines 1-10152. Book 1 of the History begins in 1139 and ends in 1194. It describes the events of the Anarchy, the role of William’s father John, John’s marriages, William’s childhood, his role as a hostage at the siege of Newbury, his injury and imprisonment in Poitou where he met Eleanor of Aquitaine and his life as a knight errant. It continues with the accusation against him of an improper relationship with Margaret, wife of Henry the Young King, his exile, and return, the death of Henry the Young King, the rebellion of Richard, the future King Richard I, war with France, the death of King Henry II, and the capture of King Richard, and the rebellion of John, the future King John. It ends with the release of King Richard and the death of John Marshal.

Available at Amazon in eBook and Paperback format.

On 29th August 1442 [his father] John Montfort V Duke Brittany (age 52) died. His son Francis (age 28) succeeded I Duke Brittany.

On 30th August 1442 Francis Montfort I Duke Brittany (age 28) and Isabella Stewart Duchess Brittany (age 16) were married. She by marriage Duchess Brittany. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland (age 38). He the son of John Montfort V Duke Brittany (deceased) and Joan Valois Duchess Brittany. They were half fourth cousin once removed. He a great x 4 grandson of King Henry III of England. She a great x 2 granddaughter of King Edward III of England.

In 1443 [his daughter] Margaret Montfort Duchess Brittany was born to Francis Montfort I Duke Brittany (age 28) and [his wife] Isabella Stewart Duchess Brittany (age 17). She a great x 3 granddaughter of King Edward III of England. She married before 29th June 1463 her first cousin once removed Francis Montfort II Duke Brittany and had issue.

1443 Beaufort Campaign

In August 1443 John Beaufort 1st Duke of Somerset (age 40) landed 7000 men at Cherbourg [Map] and then marched south. His campaign achieved little being bought off by Francis Montfort I Duke Brittany (age 29). He marched through Maine [Map] then returned to England in the winter of 1443.

In 1444 [his daughter] Marie Montfort was born to Francis Montfort I Duke Brittany (age 29) and [his wife] Isabella Stewart Duchess Brittany (age 18). She a great x 3 granddaughter of King Edward III of England.

On 16th August 1445 [his sister-in-law] Margaret Stewart Dauphine of France (age 20) died at Châlons-en-Champagne [Map]. She was buried at the Church of Saint-Laon Thouars.

On 12th February 1449 Sigismund Habsburg 4th Duke Austria (age 21) and [his sister-in-law] Eleanor Stewart Duchess Austria (age 16) were married at Merano. She by marriage Duchess Austria. She the daughter of King James I of Scotland and [his mother-in-law] Joan Beaufort Queen Consort Scotland. He the son of Frederick "Empty Pockets" Habsburg 4th Duke Austria and Anna of Brunswick-Wolfenbüttel Duchess Austria.

On 3rd July 1449 [his brother-in-law] King James II of Scotland (age 18) and Mary of Guelders Queen Consort Scotland (age 15) were married at Holyrood Abbey, Holyrood. She the daughter of Arnold Egmont Duke Guelders (age 38) and Catherine La Marck (age 32). He the son of King James I of Scotland and [his mother-in-law] Joan Beaufort Queen Consort Scotland. They were fourth cousin once removed. He a great x 2 grandson of King Edward III of England.

On 18th July 1450 Francis Montfort I Duke Brittany (age 36) died. His brother [his brother] Peter (age 32) succeeded II Duke Brittany.

On 13th October 1494 [his former wife] Isabella Stewart Duchess Brittany (age 68) died.

Francis Montfort I Duke Brittany 1414-1450 appears on the following Descendants Family Trees:

Royal Ancestors of Francis Montfort I Duke Brittany 1414-1450

Kings Wessex: Great x 11 Grand Son of King Edmund "Ironside" I of England

Kings Godwinson: Great x 11 Grand Son of King Harold II of England

Kings England: Great x 4 Grand Son of King Henry III of England

Kings Scotland: Great x 10 Grand Son of King Duncan I of Scotland

Kings Franks: Great x 8 Grand Son of Louis VII King of the Franks

Kings France: Grand Son of Charles "Beloved Mad" VI King France

Kings Duke Aquitaine: Great x 15 Grand Son of Ranulf I Duke Aquitaine

Ancestors of Francis Montfort I Duke Brittany 1414-1450

Great x 4 Grandfather: John "The Red" Capet I Duke Brittany 4 x Great Grand Son of King Henry I "Beauclerc" England

Great x 3 Grandfather: John II Duke Brittany 5 x Great Grand Son of King William "Conqueror" I of England

Great x 4 Grandmother: Blanche "Navarre" Blois Duchess Brittany 4 x Great Grand Daughter of King William "Conqueror" I of England

Great x 2 Grandfather: Arthur II Duke Brittany Grand Son of King Henry III of England

Great x 4 Grandfather: King Henry III of England Son of King John of England

Great x 3 Grandmother: Beatrice Plantagenet Daughter of King Henry III of England

Great x 1 Grandfather: John Montfort IV Duke Brittany Great Grand Son of King Henry III of England

Great x 4 Grandfather: John Capet I Count Dreux

Great x 3 Grandfather: Robert Capet IV Count Dreux

Great x 4 Grandmother: Marie Dampierre Countess Dreux

Great x 2 Grandmother: Yolande of Dreux Duchess Brittany 5 x Great Grand Daughter of King Henry I "Beauclerc" England

Great x 4 Grandfather: Jean Montfort 3 x Great Grand Son of King Henry I "Beauclerc" England

Great x 3 Grandmother: Beatrice Montfort Countess Dreux 4 x Great Grand Daughter of King Henry I "Beauclerc" England

Great x 4 Grandmother: Jeanne Chateaudun

GrandFather: John Montfort V Duke Brittany 2 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: Guy Dampierre Count Flanders 4 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandfather: Robert Dampierre III Count Flanders 5 x Great Grand Son of King William "Conqueror" I of England

Great x 4 Grandmother: Mathilde Bethune

Great x 2 Grandfather: Louis Dampierre I Count Nevers 6 x Great Grand Son of King William "Conqueror" I of England

Great x 4 Grandfather: Odo Burgundy 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandmother: Yolande Burgundy II Countess Nevers and Flanders 6 x Great Grand Daughter of King William "Conqueror" I of England

Great x 4 Grandmother: Matilda Countess of Auxerre

Great x 1 Grandmother: Joanna of Flanders Duchess Brittany 7 x Great Grand Daughter of King William "Conqueror" I of England

Great x 4 Grandfather: Manasses V Count Rethel

Great x 3 Grandfather: Hugh IV Count Rethel

Great x 2 Grandmother: Joan Rethel Countess Nevers and Rethel

Father: John Montfort V Duke Brittany 3 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: King Philip III of France 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Louis I Count Évreux 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Maria of Brabant Queen Consort France 3 x Great Grand Daughter of King Stephen I England

Great x 2 Grandfather: Philip "Noble" III King Navarre 2 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: Philip Artois 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandmother: Margaret Artois Countess Évreux Great Grand Daughter of King Henry III of England

Great x 4 Grandmother: Blanche Capet Grand Daughter of King Henry III of England

Great x 1 Grandfather: Charles "Bad" II King Navarre 3 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: King Philip IV of France 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Louis X King France I Navarre 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Joan Blois I Queen Navarre 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 2 Grandmother: Joan Capet II Queen Navarre 4 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Robert II Duke Burgundy 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandmother: Margaret of Burgundy Queen Consort France 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Agnes Capet Duchess Burgundy 2 x Great Grand Daughter of King Henry "Curtmantle" II of England

GrandMother: Joanna of Navarre Queen Consort England 4 x Great Grand Daughter of King Henry III of England

Great x 4 Grandfather: Charles Valois I Count Valois 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: King Philip "Fortunate" VI of France 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Margaret Capet Countess Valois 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 2 Grandfather: King John "The Good" II of France 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Robert II Duke Burgundy 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandmother: Joan "Lame" Burgundy Queen Consort France 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Agnes Capet Duchess Burgundy 2 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 1 Grandmother: Joan Valois Queen Consort Navarre 5 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Henry Luxemburg VII Holy Roman Emperor 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandfather: King John I of Bohemia 6 x Great Grand Son of King William "Conqueror" I of England

Great x 4 Grandmother: Margaret Brabant Countess Luxemburg and Namur

Great x 2 Grandmother: Bonne Luxemburg Queen Consort France 7 x Great Grand Daughter of King William "Conqueror" I of England

Great x 3 Grandmother: Queen Elizabeth of Bohemia

Great x 4 Grandmother: Queen Judith of Bohemia and Poland

Francis Montfort I Duke Brittany 4 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: Charles Valois I Count Valois 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: King Philip "Fortunate" VI of France 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Margaret Capet Countess Valois 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 2 Grandfather: King John "The Good" II of France 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Robert II Duke Burgundy 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandmother: Joan "Lame" Burgundy Queen Consort France 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Agnes Capet Duchess Burgundy 2 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 1 Grandfather: King Charles V of France 5 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Henry Luxemburg VII Holy Roman Emperor 5 x Great Grand Son of King William "Conqueror" I of England

Great x 3 Grandfather: King John I of Bohemia 6 x Great Grand Son of King William "Conqueror" I of England

Great x 4 Grandmother: Margaret Brabant Countess Luxemburg and Namur

Great x 2 Grandmother: Bonne Luxemburg Queen Consort France 7 x Great Grand Daughter of King William "Conqueror" I of England

Great x 3 Grandmother: Queen Elizabeth of Bohemia

Great x 4 Grandmother: Queen Judith of Bohemia and Poland

GrandFather: Charles "Beloved Mad" VI King France 4 x Great Grand Son of King Henry III of England

Great x 4 Grandfather: Robert Bourbon 1st Count Clermont 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Louis Bourbon I Duke Bourbon 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Beatrice Burgundy 6 x Great Grand Daughter of King William "Conqueror" I of England

Great x 2 Grandfather: Peter Bourbon Duke Bourbon 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: John of Avesnes II Count Hainaut II Count Holland 3 x Great Grand Son of King Stephen I England

Great x 3 Grandmother: Mary Hainaut Duchess Bourbon 4 x Great Grand Daughter of King Stephen I England

Great x 4 Grandmother: Philippa Luxemburg Countess Hainaut and Holland 5 x Great Grand Daughter of King William "Conqueror" I of England

Great x 1 Grandmother: Joanna Bourbon Queen Consort France 3 x Great Grand Daughter of King Henry III of England

Great x 4 Grandfather: King Philip III of France 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Charles Valois I Count Valois 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 2 Grandmother: Isabella Valois Duchess Bourbon 2 x Great Grand Daughter of King Henry III of England

Great x 4 Grandfather: Guy Chatillon IV Count Saint Pol 3 x Great Grand Son of King Stephen I England

Great x 3 Grandmother: Mahaut Chatillon Countess Valois Great Grand Daughter of King Henry III of England

Great x 4 Grandmother: Marie Capet Grand Daughter of King Henry III of England

Mother: Joan Valois Duchess Brittany 5 x Great Grand Daughter of King Henry III of England

Great x 4 Grandfather: Louis "Strict" Wittelsbach II Duke Upper Bavaria 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandfather: Louis Wittelsbach IV Holy Roman Emperor 3 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Matilda Habsburg Duchess Bavaria

Great x 2 Grandfather: Stephen Wittelsbach II Duke Bavaria 4 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandmother: Beatrix Świdnica Holy Roman Empress

Great x 1 Grandfather: Stephen "Magnificient Fop" Wittelsbach III Duke Bavaria 5 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Peter III King Aragon

Great x 3 Grandfather: Frederick III King Sicily

Great x 2 Grandmother: Elisabeth Barcelona Duchess Bavaria 4 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Charles II King Naples 2 x Great Grand Son of King Henry "Curtmantle" II of England

Great x 3 Grandmother: Eleanor Capet 3 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandmother: Mary of Hungary Queen Consort Naples

GrandMother: Isabeau Wittelsbach Queen Consort France 6 x Great Grand Daughter of King Henry "Curtmantle" II of England

Great x 4 Grandfather: Matteo I Visconti

Great x 3 Grandfather: Stephano Visconti

Great x 4 Grandmother: Bonacossa Borri

Great x 2 Grandfather: Bernabò Visconti

Great x 3 Grandmother: Valentina Doria

Great x 1 Grandmother: Taddea Visconti Duchess Bavaria

Great x 3 Grandfather: Mastino II della Scala

Great x 2 Grandmother: Beatrice Regina della Scala

Great x 4 Grandfather: Jacopo I da Carrara

Great x 3 Grandmother: Taddea da Carrara

Great x 4 Grandmother: Anna Gradenigo