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- Ada of Holland
- Adalais of Aquitaine, Viscountess of Auvillars & Lomagne
- Adelaide, Countess of Auxerre
- Adelaide I of Auxerre, Countess of Auxerre, 853-864
- Adelaide II of Burgundy, Countess of Auxerre, 921-936
- Adelaide, Countess Palatine of Burgundy, Countess Palatine of Burgundy, 1248–1279.
- Adelaide of Burgundy, also known as Adelaide of Chalon (941-?), Countess of Troyes, Countess of Beaume, Countess of Chalon-sur-Saône
- Adelaide of Donzy, Countess of Gien
- Adelaide I of Normandy, also known as Aelis of Normandy, Regent Countess of Aumale, 1053–1063
- Adelaide II of Normandy, Countess of Aumale, 1053–1087
- Adelaide of Provence (d.1129), also known as Adelaide of Forcalquier, Lady of Forcalquier, 1065–1129, Countess of Provence
- Adelaide of Soissons (d.1066), Countess of Soissons
- Adelaide of Susa (1020–1091), Countess of Turin, Lady of Auriate, Bredulo, Asti, Alba, Albenga and Ventimiglia
- Adelaide of Vermandois (1065–1102), Countess of Valois, Countess of Vermandois
- Adelais, Lady of Venisy (d.1221), Lady of Venisy
- Adelasia of Torres, Judge of Logudoro, 1236–1259
- Adele of Anjou, Countess of Vendôme, 1016-1032
- Adele of Valois, Counstess of Valois, Countess of Crespy
- Adelheid of Heinsberg, Countess of Heinsberg
- Adelheid of Kyburg, Countess of Kyburg
- Adelheid of Gelder (d.after 1150), Heiress of the stewardship (Ger. vogtei) of the Bishopric of Munster
- Adelicia of Sanseverino, Lady of Serino, 1283-?
- Adeline of Meulan (1014–81), Countess of Meulan, ?-1081
- Adelvie of Guise, Lady of Guise
- Adrienne of Estouteville, also known as Adrienne of Bourbon, (1512–1560), Duchess of Estouteville, Lady of Hambye, Gace and Briquebec
- Adyle of Carlat, Viscountess of Carlat
- Aelis of Troyes (d.1066), Countess of Troyes and Soissons
- Ælfwynn, Lady of the Mercians, 918-919
- Æthelflæd, Lady of the Mercians, 911-918,
- Agalbursa, Judge of Arborea, c. 1186
- Agathe of Dammartin (d.1268), Lady of Ponthieu
- Agathe of Poitiers-Valentinois, Lady of Baux, 1348-?
- Agnes de Percy, Heiress of the Percys
- Agnès de Tarroja inherited the Lordships of Solsona, Arbeca and Tarroja; wife of Ramon Folc IV, Viscount of Cardona
- Agnes of Adelon, Lady of Adelon, c1200
- Agnes of Austria (1322–1392), daughter of Leopold I., duchess in Silesia
- Agnes of Baudemont (1130–1210), Lady of Baudemont, La Fere-en-Tardenois & Longueville, Lady of Nesle, Lady of Pontarcy, Lady of Quincy, Countess of Braine
- Agnes of Bourbon (d.1288), Lady of Bourbon
- Agnes of Burgundy, Countess of Montbeliard, 1332-?
- Agnes of Cleves (d.1267), Heiress of Cleves & Heinsberg
- Agnes II of Donzy (1199–1225), Dame of Donzy, 1222-1225
- Agnes of Faucigny (d.1268), Lady of Faucigny
- Agnes of Gournay-sur-Marne (d.1143), Lady of Rochefort, Lady of Gournay-sur-Marne & Gomets, Countess of Rochefort
- Agnes of Montferrat (1180–1208), Latin Empress of Constantinople
- Agnes I of Nevers, Countess of Auxerre & Nevers, 1181–1192
- Agnes of Ponthieu (c1080-1105/1111), Countess of Ponthieu. 1100-bef. 1105
- Agnes of Thiern, also known as Alix of Thiern, Lady of Montpensier
- Aikaterina Asanina Zaccariaina (d.1462), Titular Lady of Arcadia; Heiress of the Principality of Achaia
- Algayette, Lady
- Alheidis of Heinsberg (d.after 1207), Heinress of Heinsberg
- Alheidis of Sayn (d.c1303), Heiress of Hulchrath & Saffenberg (Daughter of Henry I of Sayn (d.1259) & Agnes of Cleves (d.1267), Heiress of Cleves & Heinsberg; married Dietrich VI of Cleves (d.1275)-->
- Alice de la Roche-sur-l'Ognon (d. after 1277), Lady of Beirut
- Alice de Lacy (1281–1348), 4th Countess of Lincoln, 1311–48, 4th Countess of Salisbury, 1311–1348, Countess of Lancaster, Leicester and Derby
- Alice Montague, 5th Countess of Salisbury
- Alice of Brittany (1243–1288), Lady of Pontarcy
- Alienor of Champagne, Countess of Bar-sur-Aube
- Alix de la Tour du Pin (v.1280-1309), Dauphine of Viennois, 1307–1309
- Alix of Alençon (d.after 1220), Lady of Montgomery
- Alix of Burgundy (1258–1261), Countess of Macon & Vienne, 1224-1239
- Alix of Burgundy (1251–1290), Lady of Montjoy, Lady of Valencay, Countess of Auxerre, 1261-1290
- Alix of Chacenay (d.1278), Lady of Chacenay
- Alix of Clermont (d.1330), Viscountess of Chateaudun
- Alix of Dammartin, Countess of Dammartin
- Alix of Dreux (1255–1296), Viscountess of Chateaudun, 1259–1296, which she inherited from her mother Clemence of Chateaudun
- Alix of Dreux (1364-?), Viscountess of Dreux
- Alix of Dreux-Beu (1255–1275), Viscountess of Chateaudun, Lady of Montdoubleau
- Alix of Eu (d.1246), Lady of Hastings & Countess of Eu, 1191-1246
- Alix of Flanders (1322–1346), Lady of Richebourg
- Alix of France (1160–1225), Lady of Arques, Countess of Eu & Vexins
- Alix of Meran, Countess Palatine of Burgundy, 1248–1279
- Alix of Montfort (1218–1255), also known as Alix de Bigorre, Viscountess of Marsan & Countess of Bigorre, 1251-1255
- Alix of Thouars, Countess of Richmond & Duchess of Brittany, 1203–1221
- Almodis of La Marche (d.1116), Countess of La Marche
- Alveradis of Saffenberg, Lady of Maubach
- Amalia of Dohna-Vianen (1645–1700), Sovereign Lady and Heiress of Vianen and Ameiden, Heiress Burgravine of Utrecht
- Amalie of Zweibrücken, Lady of Rixingen, 1547–1577
- Ameline of Guise (1159–1185), Lady of Guise
- Amicia of Gloucester (1160–1225), Countess of Gloucester, 1217
- Amicia, Countess of Leicester, Countess of Leicester
- Amoene of Daun-Falkenstein, Heiress of Limburg
- Anastasia of Isenburg (1400–30), Heiress of Wied
- Andregota Galindez, Countess of Aragon, 922-925
- Anna of Jever, Lady of Jever, 1511–1536
- Anna of Kyburg, Countess of Kyburg
- Anna of Stolberg (d.1436), Countess of Stolberg
- Anna of Tecklenburg (1527–1582), Heiress of Tecklenburg and Rheda
- Anna of Wevelinghoven, Heiress of Wevelinghoven and Lievendael
- Anna Anachoutlou Komnena, Empress of Trebizond, 1341, 1341–42
- Anna Balbo Lascaris (1487–1554), Countess of Tenda, Lady of Mauro, Prela, Villanuovo, Mentone and Antibes
- Anna Lascaris, Countess of Tenda, Lady of Ventimiglia
- Anna Maria of Piombino, Princess of Piombino, 1699–1700
- Anne Boleyn, Marquess of Pembroke
- Lady Anne Clifford
- Anne of Alençon (d. 1562), Lady of La Guerche & Pouencé, 1525-1562
- Anne, Countess of Auvergne, also known as Anne de la Tour d'Auvergne, Countess of Auvergne, 1501–1524
- Anne of Auvergne (1358–1417), Lady of Mercœur & Countess of Forez, 1372–1417, Dauphine of Auvergne, 1399-1417
- Anne of Brittany, Countess of Étampes & Montfort-l'Aumary & Duchess of Brittany, 1488-1514.
- Anne of Burgundy, Dauphine of Viennois, 1269-98
- Anne of Burgundy (d.1301), Dauphine of Vienne, Countess of Vienne
- Anne of Chabannes, Countess of Dammartin
- Anne of Clermont, Lady of Baux, ?-1403
- Anne of Croy (1563–1635), Lady of Chimay
- Anne of Gloucester (1383–1438), Countess of Buckingham
- Anne of Lorraine, also known as Anne of Vaudemont, Countess of Maulevier, Duchess of Aumale, 1631–1638
- Anne of Montmorency (1385–1466), also known as Anne of Laval, Anne of Montmorency-Laval, Lady of Laval, Vitre, Acquigny, Aubigne, Tinteniac, Becherel and Romille, 1414-29
- Anne of Rohan (1604–85), Princess of Guemene
- Anne de Beauchamp, 15th Countess of Warwick (1443–1449), 15th Countess of Warwick, 1445-1449.
- Anne de Mowbray (1472–81), 8th Countess of Norfolk, 1476–1481
- Anne Genevieve of Bourbon-Conde (1619–1679), Duchess of Longueville
- Anne Scott, 1st Duchess of Buccleuch Baroness of Whitchester and Ashdale, Countess of Dalkeith, & Duchess of Buccleuch, 1663-1732
- Antoinette of Bauffremont, Countess of Charny
- Antoinette of Bourbon (1493–1583), Duchess of Guise
- Antonia Enriquez de Ribera y Portocarrero (d.1623), Duchess of Huescar
- Arsinde, Viscountess of Rocaberti and Perelada
- Attala of Macon, Viscountess of Macon
- Aurembiaix of Urgel (d.1231), Countess of Urgell
- Ava of Barcelona, Countess of Cerdanya & Besalu, 927-940
- Aveline of Nemours (d.1191/1196), Lady of Nemours
- Azaline of Fezensac, also known as Adalmure of Fezensac, Countess of Fezensac
Read more about this topic: List Of Female Rulers And Title Holders