Peter I, Duke of Brittany
Duke of Brittany from 1213 to 1221
- Died
- 1250
Peter I, also known as Peter Mauclerc and Peter of Dreux, reigned as Duke of Brittany alongside his wife Alix from 1213 to 1221, and was regent of the duchy for his minor son John I from 1221 to 1237. As duke he was also 1st Earl of Richmond from 1218 to 1235.