Stephenson Family Tree » John I (John I,) Duke of Brittany (1217-1286)

Personal data John I (John I,) Duke of Brittany 

  • First name John I,.
  • He was born on October 8, 1217 in La Roche-Bernard, Morbihan, Bretagne, France.
  • He died on October 8, 1286 in Férel, Morbihan, Brittany, France, he was 69 years old.
  • He is buried October 1286 in Eglise De I'Abbaye Notre-Dame, Billiers, Bretagne, France.
  • This information was last updated on October 20, 2023.

Household of John I (John I,) Duke of Brittany

(1) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259


(2) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259


(3) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259


(4) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259


(5) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259


(6) He is married to Blanche de Navarre.

They got married on January 16, 1236, he was 18 years old.


Child(ren):

  1. John II de Dreux  1239-1305 
  2. Thibaut de Bretagne  1245-1246
  3. Eleanor of Brittany  1248-1248
  4. Robert de Bretagne  1251-1259

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Ancestors (and descendant) of John I Duke of Brittany

John I Duke of Brittany
1217-1286

(1) 1236
(2) 1236
(3) 1236
(4) 1236
(5) 1236
(6) 1236

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Source: Wikipedia

Source: Wikipedia


About the surname Duke of Brittany


When copying data from this family tree, please include a reference to the origin:
Brian K. Stephenson , "Stephenson Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/stephenson-family-tree/I131412.php : accessed May 3, 2025), "John I (John I,) Duke of Brittany (1217-1286)".