List of nicknames of European royalty and nobility: B
- Baedan, High King of Ireland of the Yellow Hair 1
- Bagrat I the Little "The Little", "Small"
- Bagrat II, King of Abkhazia, 958–994 the Simple
- Bagrat III of Georgia the Unifier
- Bagrat V of Georgia the Great
- Balbinus the Barracks Emperor, the Emperor of the Army
- Baldomero Espartero, Prince of Vergara the Peacemaker of Spaon 2
- Baldwin I of Constantinople Baldwin of Constantinople
- Baldwin I of Flanders With the Iron Arm, the Iron-Arm, the Iron Man
- Baldwin I, Count of Bentheim, 1208–1248 the Brave
- Baldwin II of Constantinople the Purple-Born
- Baldwin II, Count of Flanders the Bald
- Baldwin II of Jerusalem Baldwin of Bourq
- Baldwin II, Count of Hainaut Baldwin of Jerusalem
- Baldwin III of Flanders the Young, the Younger
- Baldwin IV, Count of Flanders the Greatbeard, Belle-Barbe, the Bearded, the Handsome Beard, Fair Beard 3
- Baldwin IV of Jerusalem the Leper, the Leprous
- Baldwin IV, Count of Hainaut the Builder
- Baldwin V, Count of Flanders Baldwin of Lille, the Great, the Pious
- Baldwin VI, Count of Flanders the Good
- Baldwin VII, Count of Flanders Baldwin with the Axe, Hapkin
- Baldwin VIII, Count of Flanders the Brave
- Baldwin, Count of Cambrai Balza, Balzo 4
- Balian of Ibelin Balian of Ramla, Balian of Nablus, the Young, the Younger
- Barbara of Celje the Messalina of Germany
- Barbara of Portugal la Sufrida
- Barbara Palmer, 1st Duchess of Cleveland the Royal [...], the Lady 5
- Barbarossa (Ottoman admiral) the Redbeard, the King of the Seas, the King of the Sea, the Protector of Religion 6 7
- Bardanes the Turkified, the Turk, the Turned-Turk
- Barisan of Ibelin the Old, the Elder, the French
- Barnim I, Duke of Pomerania-Stettin (d.1278) the Founder
- Barnim III, Duke of Pomerania, 1295–1344 the Great
- Barnim III, Duke of Pomerania-Stettin, 1334–1368 the Great
- Barnim III, Duke of Pomerania-Stettin the Church-Founder 8
- Barnim IV, Duke of Pomerania-Wolgast (1325-1365) the Good
- Barnim IX, Duke of Pomerania-Stettin (1501–1573) the Pious, der Spillendreher
- Barnim XI, Duke of Pomerania the Pious
- Bartholomew, Lord Badlesmere the Rich
- Basarab I of Wallachia the Founder, the Great
- Basarab IV Tepelus, Prince of Wallachia, 1477–1482 the Young, the Younger
- Basarab Kaiota, Prince of Wallachia, 1473-1477 the Elder
- Basarab Laiota cel Batran the Old
- Basil I of Kiev (d.1237) the Fair
- Basil I the Macedonian
- Basil I of Rostov the Brave
- Basil II, Byzantine Emperor Bulgaroktonos, the Bulgar-Slayer, the Apogee of Byzantine Power 9 10
- Basil II of Pskov (1356–1358) Waked the Waves
- Basil III of Pskov (1448–1455) the Comb
- Balthild the Saint 11
- Bayezid I, Ottoman Sultan the Fighter , the Lightning, the Lightning Bolt, the Thunderbolt 12 13
- Bayezid II, Ottoman Sultan , the Equitablethe Fair, the Guardian , the Just, the Mystic, the Saint, the Theologian 14 15 16 17 18
- Beatrice of Faucigny (1237–1310) la Grand Dauphine, wife of Guigues VII, Dauphin of Vienne (d.1269)
- Beatrice Cenci the Beautiful Parricide 19
- BeatrIX of Swabia (1205–1235) the Young, the Younger, queen of Ferdinand III of Castile
- Bela II of Hungary the Blind
- Bela III of Hungary the Byzantine King 20
- Bela IV of Hungary the Miracle King, the Second Builder of the Hungarian Kingdom
- Benjamin Disraeli, 1st Earl of Beaconsfield Dizzy 21
- Berengar II of Italy Berengar of Ivrea
- Berengar, Count of Namur (875-932) de Lomme
- Berenguela of Castile the Great
- Berenguer Ramon I, Count of Barcelona the Hunchback 22 the Hunchback
- Berenguer Ramon II, Count of Barcelona the Fratricide
- Berenguer the Wise
- Bermudo I of Asturias the Deacon
- Bermudo II of Leon the Gouty
- Bernard I of Armagnac the Dodger
- Bernard I, Count of Besalú Taillefer
- Bernard I, Count of Rouergue, 864–872 the Calf
- Bernard I, Count of Toulouse (d.877) le Veau
- Bernard I, Viscount of Girona, 1328 the Old
- Bernard II of Auvergne (d.886)]] Hairyfoot, Plantevelue
- Bernard II Tumapaler of Gascony Tumapaler
- Bernard II, Count of Besalú Trunus
- Bernard III, Magrave of Baden-Pforzheim, 1453–1458 the Fortunate
- Bernard VII, Count of Lippe (1429–1511) the Warlike
- Bernard I of Armagnac the Suspicious, the Distrustful
- Bernard of Pont-Audemer the Dane 23
- Bernard-Aton IV (d.1129), Viscount of Albi Trencavel 24
- Bernat of Septimania
- Bernhard I, Count of Bentheim Paterbernd 25
- Bernhard of Silesia (1252/58–1285) the Cunning
- Bernhard, Duke of Silesia (1290–1326) Stateczny
- Bernhard of Silesia Skoczek
- Berthold III of Spoleto Berthold de Duce 26
- Berthold VII, Count of Henneberg-Schleussingen (c.1272–1340) the Wise
- Berthold, Duke of Carinthia the Bearded
- Berthold of Zahringen (1024–1077)
- Bertrada of Laon au Grand Pied
- Bertrand de Poulengy, Lord of Gondrecourt Pollichon27
- Bertrand du Guesclin the Eagle of Brittany, the Black Dog of Brocéliande 28 29
- Bezmer or Bayar, Prince of Bulgaria, 642–644 the Rich, l'Inlassable
- Bjorn of Denmark the Chapman 30
- Bjørn Farmann
- Bjorn I, King of Sweden, 785–800 Ironside
- Björn Ironside Haraldsson Ironside
- Bjorn Haraldsson, King of Norway (Vestfold) (892–927) the Merchant
- Blot-Sweyn the Sacrificer
- Boris, Prince Glazaty Glazaty 31
- Boleslaw V the Chaste the Short Boot, the Short Stocking
- Bogislaw XIII, Duke of Pomerania-Barth-Rugen, 1569–1606 the Godly]]
- Bolko I, Duke of Silesia the Strict
- Boleslaus III of Poland the Wry-mouth, Krzywousty
- Bolko III, Duke of Silesia-Liegnitz, 1311–1342 Szczodry
- Boleslaw II the Bald the Savage
- Boniface III of Tuscany Boniface of Canossa
- Boleslaw II the Bold the Generous, the Liberal, the Magnanimous
- Bolko III, Duke of Silesia (1291–1352) the Generous, the Liberal, the Magnanimous
- Boniface of Savoy the Roland
- Boleslaw V the Chaste the Timid
- Boleslaw III of Silesia (1291–1352) the Spendthrift, the Extravagant
- Bogdan III cel Orb the Blind
- Boleslaus III of Bohemia the Blind
- Boleslaus, Duke of Bohemia the Brave
- Bogdan III cel Orb the One-Eyed
- Bohemund IV of Antioch the One-Eyed
- Boguslaw V, Duke of Pomerania, 1368–1373 the Old
- Boso I, Count of La Marche and Perigord, 958–988 the Old
- Boso III of Turin(d.855), Count of Italy the Old
- Boleslaw III of Silesia the Thriftless
- Boleslaw II the Bald the Tollgate
- Boleslav II of Bohemia the Chaste
- Boleslaw V the Chaste
- Bouchard, ''Minur Dominicur'' of Corsica the Constable
- Bogdan I of Moldavia the Saxon
- Boleslaw I the Brave the Brave
- Boleslaw II the Bald
- Boleslaw II the Bold
- Boleslaw II, Duke of Silesia-Liegnitz, 1241–1278 the Bald
- Boril of Bulgaria Boril Strez
- Bohemund III of Antioch the Stammerer
- Bolko V, Duke of Silesia the Hussite
- Boabdil the Sleeper, the Sleeping Hero, the Sleeping King
- Boabdil "The Little", "Small"
- Bolko II or Boleslaus II, Duke of Silesia-Swidnica, 1326–1368 "The Little", "Small"
- Bohemund III of Antioch "Le Bembe"
- Boleslaw I the Tall
- Bolko II of Silesia the Short
- Bouchard III of Nevers (1055–1085), Count of Vendome the Young, the Younger
- Boris Godunov the Great Sovereign's Brother-in-Law 32
- Botho III, Count of Stolberg (1467–1538) the Blissful, the Beatific
- Boto of Botenstein (1027–1104) the Bold, son of Hartwig II (d.1027), Count Palatine of Bavaria
- Bouchard Ratepilate, Count of Vendome Boterel
- Bouchard II, Count of Vendome, 1023–1028 the Bald
- Bouchard II, Lord of Montmorency, 980–1020 the Bearded
- Boudica the Bringer of Victory
- Boris I of Bulgaria the Saint 33
- Boris and Gleb the Saint
- Bolesław III Wrymouth el Ironico 34
- Bogislaw III, Duke of Pomerania the Great
- Bogislaw X, Duke of Pomerania, 1471–1523 the Great
- Boleslaw I of Silesia (1270-1301) the Great
- Bolko I, Duke of Silesia (1270–1301) the Great
- Boris of Tver (1425–1461) the Great
- Boleslav II of Bohemia the Debonair
- Boleslaus II, Duke of Silesia, 1242–1278 Rogatka
- Boabdil the Unlucky
- Botho I, Count of Stolberg-Stolberg (1403–1455) the Elder
- Bogislaw XIII, Duke of Pomerania the Pious
- Boleslaw V the Chaste the Pious
- Boleslav II of Bohemia the Pious
- Boniface III of Tuscany the Pious 35
- Botho II, Count of Stolberg-Stolberg, 1511–1538 the Fortunate
- Boleslaw IV the Curly
- Bohemund VI of Antioch the Handsome
- Bohemund VII of Tripoli the Handsome Prince
- Boleslav I of Bohemia the Cruel
- Boleslaw II the Bold the Cruel
- Bolko I, Duke of Silesia (1252/56–1301) the Cruel
- Bon Adrien Jeannot de Moncey Fabius
- Bogdan I of Moldavia the Founder
- Boleslav III of Bohemia the Red
- Boleslaus II, Duke of Silesia, 1242–1278 Rogatka
- Boris Godunov the Tsar-Slave 36
- Bouchard I of Vendome the Venerable
- Brunhilda of Austrasia the Visigoth
- Charlotte of Spain]] the Vixen of Queluz <!--She was reputedly a nymphomaniac who died
in Queluz Palace.-->
- Brian Boru the Irish Charlemagne 37
- Boudica the Warrior Queen38
- Bohemund VI of Antioch the Good
- Bretislaus I of Bohemia the Bohemian Achilles, the Czech Achilles 39 40
- Burchard of Mansfeld the Elder
- Burchard I of Querfurt the Pious
- Bruno I, Archbishop of Cologne the Great
- Brochwel Ysgithrog of the Tusk
- Bruno I, Archbishop of Cologne the Saint
- Bruno of Querfurt the Saint
- Brian IV, King of Thomond, 1343-1350 the White 41
- Bruno of Querfurt the Second Apostle of the Prussians 42
- Branimir of Croatia the Glorious Duke 43
- Brochwel Ysgithrog the Fanged
- Brochwel Ysgithrog, King of Powys Brochwel of the Canine Teeth
- Brian O'Brien, King of Thomond, 1369–1399 Brian of the Battle of Aonagh
- Brian, King of Thomond, 1366–1399 Brian of the Battle of Nenagh (Catha-an-Aonaigh)
- Brian Boru the Sleeper, the Sleeping Hero, the Sleeping King
- Brian Boru of the Tributes (Boruma) 44
- Bretislaus I of Bohemia the Warrior
- Brian III, King of Thomond, 1268-1277 the Red 45
- Burebista of Dacia the Cunning
- Burchard of Mansfeld the Young, the Younger
- Burkhard I of Zollern (d.1193), Count of Hohenberg the Whiner
- Budic II, King of Brittany "The Emperor of Brittany" 46