Boleslaus (Boleslav) gained his peculiar nickname for an act of particular brutality. His brother was Wenceslas I (Vaclav). Wenceslas, as the older brother, was the Duke of Bohemia. Boleslaus, at the instigation of their mother, Drahomira, murdered Wenceslas and took the title. Boleslaus and Wenceslas were the sons of Vratislaus I (Vratislav), who died in battle in the year 921. Their grandparents, Borivoj and Ludmila, were baptized by St. Methodius, who, along with his brother Cyril, popularized Slavic (rather than Latin) Christianity in Bohemia and Moravia. After the death of Vratislaus, Ludmila took charge of caring for and educating Wenceslas, while Drahomira took care of Boleslaus. Drahomira had been a pagan, and perhaps still was. Some believe that this isRead more.