Person:John III, Duke of Brittany (1)

Jean III _____, duc de Bretagne
b.8 Mar 1286
d.30 Apr 1341
m. 1277
  1. Jean III _____, duc de Bretagne1286 - 1341
  2. Guy de Bretagne1287 - 1331
  3. Pierre de Bretagne1289 - 1312
  • HJean III _____, duc de Bretagne1286 - 1341
  • WJoan of Savoy1310 - 1344
m. 21 Jun 1310
Facts and Events
Name Jean III _____, duc de Bretagne
Alt Name John III, "The Good" Bretagne, Duke of Brittany
Gender Male
Birth[1] 8 Mar 1286
Marriage to Joan of Savoy
Marriage to Isabel _____, de Valois
Marriage 21 Jun 1310 Dispto Isabel de Limoges Princess Of Castile
Death[1] 30 Apr 1341
Reference Number? Q259146?

the text in this section is copied from an article in Wikipedia

'John III the Good' (in Breton Yann III, in French Jean III; 8 March 128630 April 1341) was Duke of Brittany, from 1312 to his death and 5th Earl of Richmond from 1334 to his death. He was the son of Duke Arthur II of Brittany and Mary of Limoges, his first wife. John was strongly opposed to his father's second marriage to Yolande of Dreux, Queen of Scotland and attempted to contest its legality.

In 1297, John married Isabella of Valois, eldest child of Charles, Count of Valois and his first wife Margaret of Naples. At the time of their marriage John was eleven years old and his bride five. She died childless in 1309.

In 1310, John married his second wife, Isabella of Castile. She died childless in 1328.

In 1329, John married his third wife Joan of Savoy. He predeceased his third wife by three years and died childless. He was unwilling to cede the Duchy of Brittany to his half-brother John of Montfort, son of his hated step-mother Yolande of Dreux. He wished to leave the duchy to the french King Philip VI, but his nobles objected. The marriage of his niece Joanna of Dreux to Charles of Blois gave Charles a plausible claim to the duchy, but the matter was unresolved at John's death.

After his death, John of Montfort claimed his rights as duke of Brittany, but King Philip VI supported the Blois faction, and the Breton War of Succession (1341–1364) was triggered. The Breton Civil War was fought between the House of Blois and the House of Montfort. It became part of the Hundred Years' War, as England supported the Montfort faction, which won, against the House of Blois, which was supported by France.

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  1. 1.0 1.1 John III, Duke of Brittany, in Wikipedia: The Free Encyclopedia.