Dukes & Duchesses of Brittany
The Duchy of Brittany had five rulers during the period in which the Tudors ruled England, up until 1559 when it merged with the French Crown.
| Monarch | Dates of Reign | Spouse(s) |
| François II (Fransez II in Breton) |
26 December 1458 – 9
September 1488 |
Marguerite of Brittany Marguerite de Foix of Navarre |
| Anne | 9 September 1488 – 9 January 1514 |
Charles VIII of France |
| Claude | 9 January 1514 – 20 July 1524 | François I of France |
| François III | 10 July 1524 – 10 August 1536 | |
| Henry | 10 August 1536 – 10 July 1559 Duchy of Brittany merged with French Crown |
Catherine de' Medici |
