Хто одружився на Жан I (герцог Бретані)?

Жан I Рудий (*Jean Ier le Roux, бл. 1217/1218 — 8 жовтня 1286) — герцог Бретані у 1221—1286 роках.

Blanche of Navarre (1226 – 12 August 1283), also known as Blanche of Champagne, was the daughter of Theobald the Troubador, King of Navarre and Count of Champagne, and his second wife Agnes of Beaujeu. She was a member of the House of Champagne. By her marriage to John I, Duke of Brittany, she became Duchess consort of Brittany.