# List of duchesses consort of Brittany

Some consorts of the dukes of Brittany and its predecessor states had significant influence over their spouse. Listed are the wives of the dukes of Brittany (some of whom claimed the title of king of Brittany) who were styled duchesses of Brittany. Although there were six suo jure duchesses of Brittany, the husbands of those duchesses were jure uxoris dukes and not consorts. Little is known about the duchesses whose husbands reigned prior to the year 900 besides their names.
Not all wives of the monarchs became consorts, as they may have died, been divorced, or had their marriage declared invalid prior to their husband's accession to the throne, or married him after his abdication. Such cases include
* Beatrice of England, the second daughter of Henry III, King of England; only wife of John II (as the Earl of Richmond), married 22 January 1260, died 24 March 1275.
* Marie, Viscountess of Limoges, the second daughter of Guy VI, Viscount of Limoges; first wife of Arthur II (as heir to the duchy of Brittany), married 1275, died 1291.
* Isabelle of Valois, the eldest daughter of Charles I, Count of Valois; first wife of John III (as heir to the duchy of Brittany), married 1297, died 1309.
* Yolande of Anjou, the youngest daughter of Louis II of Anjou, King of Naples; first wife of Francis I (as heir to the duchy of Brittany), married 1431, died 1440.
* Margaret of Burgundy, the third daughter of John the Fearless, Duke of Burgundy; first wife of Arthur III (as Lord of Parthenay and Duke of Touraine (later Constable of France)), married 10 October 1423, died 2 February 1441.
* Jeanne d'Albret, the daughter of Charles II, Count of Dreux; second wife of Arthur III (as Lord of Parthenay and Constable of France), married 29 August 1442, died 1444.

## Queen and Duchess of Brittany
### Early duchesses and queens

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Argentaela | ? | ? | ? | 846 husband's accession | 7 March 851 husband's death | ? | Nominoe |
| Marmohec | ? | ? | ? | 7 March 851 husband's accession | before 857 | before 857 | Erispoe |
| Wembrit | ? | ? | ? | November 857 as Duchess 868 as Queen | 25 June 874 husband's death | 877 | Salomon |
| Prostlon of Brittany | Salomon of Brittany | ? | ? | 874 husband's accession in opposition with Gurvand | 876 husband's death | 877 | Pasquitan |
| Lotitia of Brittany | Erispoe of Brittany | ? | ? | 874 husband's accession in opposition with Pasquitan | 876 husband's death | ? | Gurvand |
| Unnamed | ? | ? | ? | 877 husband's accession in opposition with Alan I | 888 husband's death | ? | Judicael |
| Oreguen of Rennes | Gurvand, Duke of Brittany | ? | ? | 876 as Duchess 890 as Queen | 907 husband's death | ? | Alan I |
The succession was interrupted by the Norman occupation (907–937)

### House of Nantes

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Roscille of Anjou | Fulk I, Count of Anjou (Anjou) | ? | 925 | 937 husband's accession | 948 | 948 | Alan II |
| ? of Blois | Theobald the Ancient, Viscount of Blois and Tour (Blois) | ? | 943/8 | 943/8 | 952 husband's death | ? | Alan II |
| ? of Blois | Theobald the Ancient, Viscount of Blois and Tour (Blois) | ? | 954 | 958 husband's accession? | 960 husband's death | ? | Fulk II of Anjou |
| Unnamed | ? | ? | ? | 960 husband's accession | 981 husband's death | ? | Hoël I |
| Aremburge, Lady of Ancenis | ? | ? | ? | 981 husband's accession | 988 husband's death | ? | Guerech |

### House of Rennes

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Ermengarde of Anjou | Geoffrey I, Count of Anjou (Anjou) | - | 973 | 973 | after 982 | after 982 | Conan I |
| Hawise of Normandy | Richard I, Duke of Normandy (Normandy) | - | 996 | 996 | 20 November 1008 husband's death | 21 February 1034 | Geoffrey I |
| Bertha of Blois | Odo II, Count of Blois (Blois) | - | - | - | 1 October 1040 husband's death | 11/13 April 1085 | Alan III |

### House of Cornouaille

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Constance of Normandy | William I of England (Normandy) | 1061 | 1086 | 1086 | 13 August 1090 | 13 August 1090 | Alan IV |
| Ermengarde of Anjou | Fulk IV, Count of Anjou (Anjou) | 1068 | 1093 | 1093 | 13 October 1119 husband's death | 1 June 1146 | Alan IV |
| Maud FitzRoy | Henry I of England (Normandy) | ? | before 1113 | before 1113 | 17 September 1148 husband's death | after 1128 | Conan III |

### House of Penthièvre

| Picture | Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| | Margaret of Huntingdon | Henry of Scotland, 3rd Earl of Huntingdon (Dunkeld) | 1140 | 1160 | 1160 | 20 February 1171 husband's death | 1201 | Conan IV |

### House of Dreux

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Blanche of Navarre | Theobald I of Navarre (Champagne) | 1226 | 16 January 1236 | 16 January 1236 | 11/12 August 1283 | 11/12 August 1283 | John I |
| Yolande de Dreux, Countess of Montfort-l'Amaury | Robert IV, Count of Dreux (Dreux) | 1263 | May 1292/4 | 18 November 1305 husband's accession | 27 August 1312 husband's death | 2 August 1330 | Arthur II |
| Isabella of Castile | Sancho IV of Castile (Anscarids) | 1283 | 21 June 1310 | 27 August 1312 husband's accession | 24 July 1328 | 24 July 1328 | John III |
| Joanna of Savoy | Edward, Count of Savoy (Savoy) | 1310 | 21 March 1330 | 21 March 1330 | 30 April 1341 husband's death | 29 June 1344 | John III |

### House of Montfort

| Name | Father | Birth | Marriage | Became Consort | Ceased to be Consort | Death | Spouse |
| Joanna of Flanders | Louis, Count of Nevers (Dampierre) | 1295 | March 1329 | 30 April 1341 husband's accession | 16 September 1345 husband's death | September 1374 | John of Montfort |
| Mary of England | Edward III of England (Plantagenet) | 10 October 1344 | summer of 1361 | summer of 1361 | 1362 | 1362 | John IV |
| Joan de Holland | Thomas Holland, 1st Earl of Kent (Holland) | 1350 | May 1366 | May 1366 | after 25 December 1384 | after 25 December 1384 | | John IV |
| Joanna of Navarre | Charles II of Navarre (Évreux) | 1370 | 2 October 1386 | 2 October 1386 | 1 November 1399 husband's death | 9 July 1437 | John IV |
| Joan of France | Charles VI of France (Valois) | 24 January 1391 | 19 September 1396 | 1 November 1399 husband's accession | 27 September 1433 | 27 September 1433 | John V |
| Isabella of Scotland | James I of Scotland (Stewart) | autumn of 1426 | 30 October 1442 | 30 October 1442 | 18 July 1450 husband's death | 13 October 1494/5 March 1499 | Francis I |
| Françoise d'Amboise | Louis d'Amboise, Viscount of Thouars and Prince of Talmond (Amboise) | 29 May 1427 | June 1441/2 | 18 July 1450 husband's accession | 22 September 1457 husband's death | 4 November 1485 | Peter II |
| Catherine of Luxembourg-Saint-Pol | Peter of Luxembourg, Count of Saint-Pol (Luxembourg-Saint-Pol) | ? | 2 July 1445 | 22 September 1457 husband's accession | 26 December 1458 husband's death | 1492 | Arthur III |
| Margaret of Brittany | Francis I, Duke of Brittany (Montfort) | 1443 | 16 November 1455 | 26 December 1458 husband's accession | 25 September 1469 | 25 September 1469 | Francis II |
| Margaret of Foix | Gaston IV, Count of Foix (Foix) | 1453 | 27 June 1471/4 | 27 June 1471/4 | 15 May 1486 | 15 May 1486 | | Francis II |
| Catherine de' Medici | Lorenzo II de' Medici, Duke of Urbino (Medici) | 13 April 1519 | 28 October 1533 | 10 August 1536 husband's accession | 31 March 1547 Brittany ceased to exist | 5 January 1589 | Henry |