John I, known as John the Red due to the colour of his beard, was Duke of Brittany from 1221 to his death and 2nd Earl of Richmond in 1268.
John was the eldest of three children born to Duchess Alix and her husband and jure uxoris co-ruler, Duke... Wikipedia
Born: 1217
Died: October 8, 1286 (age 69 years), Château de L'Isle-Adam, L'Isle-Adam
Great grandchildren: John III, Duke of Brittany, John of Montfort, Guy de Penthièvre, and more
Parents: Peter I, Duke of Brittany and Alix, Duchess of Brittany
Grandchildren: Arthur II, Duke of Brittany, Blanche of Brittany, Marie of Brittany, Countess of Saint-Pol, and more
Spouse: Blanche of Navarre, Duchess of Brittany (m. 1236)