Boleslaus (also Boleslav, Boleslaw, Bolesław) may refer to: In dukes of Bohemia:Boleslaus I of Bohemia (died 967 or 972), known as 'the Cruel', ruling from 929 (or 935) to 972 (or 967)Boleslaus II of Bohemia (c.920–999), known as 'the Pious', ruling from 927 to 999Boleslaus III of Bohemia (died 1037), known as 'the Red' or 'the Blind', ruling from 999 to 1002
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