John III, Duke of Brittany
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John III of Dreux (in French Jean III de Dreux) (March 8, 1286 – April 30, 1341), known as the Good, was duke of Brittany, from 1312 to his death. He was son of Duke Arthur II and Mary of Limoges, his first wife.
In 1329, John married , Joan, only child of Edward of Savoy. His death triggered the Breton War of Succession (1341–1364), which opposed the House of Blois and the rights of his niece Joanna of Dreux, to the House of Montfort, a cadet branch of the ducal family of Brittany, led by John of Montfort and his homonymous son. This civil war was an incident of the Hundred Years' War.
[edit] See also
| Preceded by: Arthur II |
Duke of Brittany 1312–1341 |
Succeeded by: (disputed between: John IV and Joanna with Charles) |
| Preceded by: John of Brittany |
Earl of Richmond 1334-1341 |
Succeeded by: (extinct) |
