Jean I, Duke of Alençon

Coat of arms of the counts and dukes of Alençon of the House of Valois.

Coat of arms of the counts of Perche.

John I of Alençon, called the Sage (1385, Château d'Essay, – 25 October 1415, Azincourt), was the son of Peter II of Alençon and Marie de Chamaillard. In 1404, he succeeded his father as Count of Alençon and Perche. He was made Duke of Alençon in 1414.

He commanded the second division of the French army at the Battle of Agincourt. When the English broke through the first division, he led a countercharge. He is sometimes credited with killing Edward, Duke of York, wounding Humphrey, Duke of Gloucester, and cutting an ornament from the crown of Henry V of England; but he was then overpowered by King's bodyguard, and slain by the Welsh nobleman Dafydd Gam before he could yield himself.

Family

In 1396, he married Marie of Brittany (1391–1446), daughter of John V, Duke of Brittany. They had five children:

1. Pierre d'Alençon (1407, Argentan – 1408)
2. Jean d'Alençon, Duke of Alençon (1409–1476)
3. Marie d'Alençon (1410, Argentan, – 1412, Argentan)
4. Jeanne d'Alençon (1412, Argentan – 1420)
5. Charlotte d'Alençon (1413, Argentan – 1435, Lamballe)

He also had two illegitimate children:

1. Pierre d'Alençon (d. 1424, Battle of Verneuil), Lord of Gallandon
2. Marguerite d'Alençon, married Jean de St-Aubin, Lord of Preaux

New creation	Duke of Alençon 1414–1415	Succeeded by John II
Preceded by Peter II	Count of Alençon 1404–1414	Succeeded by John II
	Count of Perche 1404–1415