YourRoots by Genomelink
banner

Sign up to explore more

Create a free account to navigate family trees, view ancestors, and discover connections.

Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort 1339–1399 – Genealogical Records

Birth Date: NOV 1339

Birth Location: Nantes, Loire Atlantique, Pays de la Loire, France

Death Date: 2 NOV 1399

Death Location: Nantes Cathedral, Nantes, Pays de la Loire, France

Father: Jean Montfort

Mother: Joanna, Dampierre

Spouse(s): Mary, Plantagenet, Joan Valois, Joan, Holland

Children(s): Blanche Bretagne, Richard, Bretagne, Pierre Montfort/

The story of Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort began in 1339 in Nantes, Loire Atlantique, Pays de la Loire, France. Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort married Joan Joanna Of Navarre Duchess Of Brittany Queen Consort Of England Valois, Joan Duchess Consort Of Brittany Holland, Mary Of Waltham Duchess Of Brittany Plantagenet, and had children including Blanche Bretagne, Pierre Jean 5Th 6Th Duke Of Brittany Montfort, Richard Of Tampes Bretagne. Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort passed away in 1399 in Nantes Cathedral, Nantes, Pays de la Loire, France.

Find more search results for Jean Montfort
JM

Reliability Score

This score reflects the reliability of the source family tree. A high rating indicates a trustworthy source with strong data consistency.

Reliability Score:
C
Criteria:
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
  • N/A 0 criteria (Insufficient)

This tree's reliability score:

  • Record available
  • Descendant's record available
  • Star tree owner

Biography

  • The story of Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort began in 1339 in Nantes, Loire Atlantique, Pays de la Loire, France.
  • Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort married Joan Joanna Of Navarre Duchess Of Brittany Queen Consort Of England Valois, Joan Duchess Consort Of Brittany Holland, Mary Of Waltham Duchess Of Brittany Plantagenet, and had children including Blanche Bretagne, Pierre Jean 5Th 6Th Duke Of Brittany Montfort, Richard Of Tampes Bretagne.
  • Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort passed away in 1399 in Nantes Cathedral, Nantes, Pays de la Loire, France.

Immediate Family

Parents

Spouses(s)

Children(s)

Jean Montfort's Ancestors

Self
Jean Montfort
1339–1399
Birth Place: Nantes, Loire Atlantique, Pays de la Loire, France
Parents
Jean ( John ), the 3rd, Duke of Brittany, 6th Earl of Richmond, Count of Montfort
1295–1345
Joanna, (of Flanders, Duchess of Brittany) Dampierre
1295–1374
Grandparents
Arthur, (the 2nd, Duke of Brittany, 5th Earl of Richmond Dreux) Montfort/
1261–1312
Yolande, (Countess of Montfort, Queen of Scotland) Dreux
1263–1330
Great-Grandparents
Jean, Dreux
1238–1305
Beatrice, Plantagenet
1242–1275
Robert, Dreux
1241–1282
Beatrice, Montfort
1248–1312
2nd-Great-Grandparents
Jean, Dreux
1217–1286
Blanche, Champagne
1220–1283
Henry, Plantagenet
1207–1272
Eleanor, Berenguer
1223–1291
Jean, Dreux
1215–1248
Marie, Dampierre
1220–1274
John, Montfort
1228–1249
Jeanne, Chateaudon
1227–1252

Jean Montfort's Descendants

1.
JM
Jean (( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of) Montfort (NOV 1339–2 NOV 1399) m. Mary, (of Waltham, Duchess of Brittany) Plantagenet (10 OCT 1344–1362) m. Joan (( Joanna ), of Navarre, Duchess of Brittany, Queen consort of England) Valois (1370–11 AUG 1437) m. Joan, (Duchess Consort of Brittany) Holland (1356–1384)
  1. 1. Blanche Bretagne 1395–1419
  2. 2. Richard, (of Tampes) Bretagne 1396–1438
  3. 3. Pierre (( Jean ), 5th 6th, Duke of Brittany) Montfort/ 1389–1442 m. Joan (( Joanna ), of Navarre, Duchess of Brittany, Queen consort of England) Valois 1370–1437
    1. 1. Francis, (the 1st, Count of Montfort, Earl of Richmond, Duke of) Brittany 1414–1450 m. Isabella (Elizabeth) Stewart 1426–1494

Jean Montfort's Timeline

2 Records

1339
NOV 1339
Birth of Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort in Nantes, Loire Atlantique, Pays de la Loire, France
Nantes, Loire Atlantique, Pays de la Loire, France
1399
2 NOV 1399
Age 60
Death of Jean ( John ), the 4th, The Conqueror, Duke of Brittany, 7th Earl of Richmond, Count of Montfort in Nantes, Loire Atlantique, Pays de la Loire, France
Nantes, Loire Atlantique, Pays de la Loire, France

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: NOV 1339
    Event Place: Nantes, Loire Atlantique, Pays de la Loire, France

    Genealogy Event 2
    Event Type: Death
    Event Date: 2 NOV 1399
    Event Place: Nantes, Loire Atlantique, Pays de la Loire, France

    Genealogy Event 3
    Event Type: Burial
    Event Place: Nantes Cathedral, Nantes, Pays de la Loire, France

About YourRoots

Family Tree Map

Explore your family tree geographically

Import your GEDCOM file to transform your family tree into an interactive global map. See your roots laid out visually and understand your true geographic heritage.

Powerful tools like "Trace Back To Me" instantly map your family's migration paths from a chosen ancestor all the way back to you.

LEARN MORE
AI Genealogy Research

Discover ancestors beyond "end-of-line" automatically

Import your family tree and let AI expand it for you. AI Ancestor Finder scans "end-of-line" ancestors to uncover their parents across hundreds of family lines at once. AI Deep Research analyzes selected ancestors and family clusters, suggesting relevant records and next steps.

Turn on Auto Research Mode to get new discoveries daily or weekly, so your tree keeps growing even while you're away.

LEARN MORE
DNA Match

Find more DNA matches across all DNA tests

Combine your DNA data with your family tree to unlock the full power of YourRoots DNA Match. Connect with relatives across major testing services — Ancestry, 23andMe, MyHeritage, and more.

View your matches' maps and trees to identify shared ancestors, and soon you'll be able to add them directly to your own tree and map.

LEARN MORE
Ancestry Reports

Ancestry DNA analysis that goes deeper than others

Unlock exclusive reports that reveal your deeper origins.

  • Deep Ancestry Report — Analyze 130+ ethnicities, sub-regions, and 1,800+ communities in one detailed view.
  • Global & Native American Reports — Developed with Stanford researchers to uncover hidden ancestries across all 22 chromosomes.
  • Ancient DNA Series — Compare your DNA with 1,000+ ancient genomes from Viking, Celtic, and early American civilizations.
LEARN MORE