Biography of Francis Montfort I Duke Brittany 1414-1450
Paternal Family Tree: Capet
Maternal Family Tree: Tomasina Morosini
Francis Montfort I Duke Brittany and Isabella Stewart Duchess Brittany were married. She by marriage Duchess Brittany. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. He a great x 4 grandson of King Henry III of England. She a great x 2 granddaughter of King Edward III of England. 
Francis Montfort I Duke Brittany and Yolande Valois Anjou Duchess Brabant Duchess Brittany were married. She by marriage Duchess Brittany. She the daughter of King Louis of Naples and Yolanda Barcelona Queen Consort Naples. 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 01 Nov 1399 [his grandfather] John Montfort V Duke Brittany (age 60) died. His son [his father] John Montfort V Duke Brittany (age 9) succeeded V Duke Brittany 1221 Dreux.
On 14 May 1414 Francis Montfort I Duke Brittany was born to John Montfort V Duke Brittany (age 24) and Joan Valois Duchess Brittany (age 23). Coefficient of inbreeding 2.83%.
On 27 Sep 1433 [his mother] Joan Valois Duchess Brittany (age 42) died.
On 29 Aug 1442 [his father] John Montfort V Duke Brittany (age 52) died. His son Francis Montfort I Duke Brittany (age 28) succeeded I Duke Brittany.
In 1443 [his daughter] Margaret Montfort Duchess Brittany was born to Francis Montfort I Duke Brittany (age 28) and Isabella Stewart Duchess Brittany (age 17). She a great x 3 granddaughter of King Edward III of England.
In Aug 1443 John Beaufort 1st Duke 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 Isabella Stewart Duchess Brittany (age 18). She a great x 3 granddaughter of King Edward III of England.
On 18 Jul 1450 Francis Montfort I Duke Brittany (age 36) died. His brother [his brother] Peter Montfort II Duke Brittany (age 32) succeeded II Duke Brittany 1364 War of Montfort.
[his father] John Montfort V Duke Brittany and [his mother] Joan Valois Duchess Brittany were married. She by marriage Duchess Brittany 1341 War of Sucession. She the daughter of Charles "Beloved Mad" VI King France and Isabeau Wittelsbach Queen Consort France. He the son of John Montfort V Duke Brittany and Joanna of Navarre Queen Consort England. 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. 
Kings Wessex: Great x 11 Grand Son of King Edmund "Ironside" I of England
Kings England: Great x 4 Grand Son of King Henry III of England
Kings Scotland: Great x 9 Grand Son of Malcolm III King Scotland
Kings Franks: Great x 8 Grand Son of Louis VII King Franks
Kings France: Grand Son of Charles "Beloved Mad" VI King France
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 Capet 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 Capet Duke Brittany Grand Son of King Henry III of England
Great x 4 Grandfather: King Henry III of England
Son of King John "Lackland" of England
Great x 3 Grandmother: Beatrice Plantagenet Daughter of King Henry III of England
Great x 4 Grandmother: Eleanor of Provence Queen Consort 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 Capet 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 Dampierre
Great x 1 Grandmother: Joanna Dampierre 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: Philip "Bold" III King 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 Reginar Queen Consort France 5 x Great Grand Daughter of King William "Conqueror" I of 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: Philip "The Fair" IV King 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 4 Grandfather: King Wenceslaus II of Bohemia and Poland
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 4 Grandfather: King Wenceslaus II of Bohemia and Poland
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 Hainault II Count Hainault II Count Holland 5 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandmother: Mary Hainault Duchess Bourbon 6 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandmother: Philippa Luxemburg Countess Hainault 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: Philip "Bold" III King 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 4 Grandmother: Isabella Barcelona Queen Consort France
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 5 x Great Grand Son of King William "Conqueror" I of 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