| |
| | John IV, Duke of Brittany - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-07) |
 | | He was son of Duke Arthur II and Yolande de Dreux, countess of Montfort, his second wife. |
 | | When his half-brother, duke John III, died with no male heirs in 1341, John decided to fight the rights of his niece Joanna of Dreux and her husband Charles of Blois to the duchy of Brittany. |
 | | John IV died without accomplishing his objective of becoming sole ruler of Brittany, but his wife Joanna of Flanders continued the fight in the name of their son John V who eventually won the Succession War. |
| www.sterlingheights.us /project/wikipedia/index.php/John_IV,_Duke_of_Brittany (240 words) |
|