Just) B "~ the Bad": Alexander III of Wallachia (Romanian: Alexandru cel Rău) Arnulf, Duke of Bavaria () Charles II of Navarre () Emund of Sweden (; more commonly known as Emund the Old) Mihnea of Wallachia (Romanian: Mihnea cel Rău) Ordoño IV of León () Sigurd Magnusson, pretender of Norway ( or ) William I of Sicily () "~ the Bald": Charles II of France () Baldwin II, Count of Flanders (; ) Idwal ab Anarawd of Gwynedd () Radu II of Wallachia (Church Slavonic: Radu Praznaglava) "~ Barbarossa": Frederick I, Holy Roman Emperor () "~ Barefoot" or "~ Bareleg": Magnus III of Norway () "~ Barn-Lock": Magnus III of Sweden () "~ the Bastard": Ebalus, Duke of Aquitaine (, ) Henry II of Castile (; more commonly known as Henry of Trastámara) John I of Portugal (; more commonly known John of Avis, John the Great, or John of Fond Memory) William I of England (; or ; more commonly known as William the Conqueror) "~ the Battler": Alfonso I of Aragon (; also known as Alfonso the Warrior) "~ the Bavarian": Louis IV of Germany () "~ the Bear": Albert the Bear () "~ the Bearded": Baldwin IV, Count of Flanders () Berthold II, Duke of Carinthia () Constans II, Byzantine Emperor () Eberhard I, Duke of Württemberg () Egino IV, Count of Urach () Geoffrey III of Anjou () "~ Beauclerk" or "~ Beauclerc" (French, "Good Clerk"): Henry I of England () "~ the Beer Jug": John George I, Elector of Saxony () "~ the Beloved": Louis XV of France () "~ the Bewitched": Charles II of Spain () "~ the Bibliophile": Manuel II of Portugal (; more commonly known as Manuel the Patriot or Manuel the Unfortunate) "~ the Big Nest": Vsevolod III Yuriyevich of Vladimir (, ) "~ the Black Prince": Edward the Black Prince () "~ the Black": Leszek II the Black () Fulk III of Anjou () Henry III, Holy Roman Emperor (; also called the pious) Henry IX, Duke of Bavaria () Margaret II, Countess of Flanders () "~ the Blessed": Alexander I of Russia () "~ the Blind": Boleslaus III of Bohemia (; also known as Boleslaus the Red) Béla II of Hungary () Magnus IV of Norway () Stefan Branković () Vasily II Vasiliyevich () Bogdan III of Moldavia () John of Bohemia (; ; ) "~ the Blind