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Cognomen Boleslas (Boleslas ) , globally, is an extremely rare last name. Predominantly, Boleslas is the forename as well as the last name.
Boleslao, Boleslau, Boleslav, Boleslavs, Boleslaw, Bolesław, Boļeslavs, Болеслав, and בולסלב
Lukasik, and Chamielec