Boleslaus, derived from the Slavic elements 'bolez' meaning 'fame' and 'slav' meaning 'glory', is a historic masculine given name of Slavic origin. It was particularly popular among early medieval royalty in Central Europe, with notable bearers including several Holy Roman Emperors. The name is also associated with prominent figures in Polish history, further contributing to its cultural significance. Boleslaus may be considered both an ancient and a unique choice for a given name, offering a connection to European history and culture.
The name Boleslaus experienced fluctuating popularity over the years, with peaks of 22 births in both 1922 and 1923, but it generally saw a decline in usage after the late 1920s, with fewer than 10 births per year from 1925 onwards.