Surname Багуслаў (Bogusław 
, Boguslaw 
, Багуслаў) , throughout the world, is a widespread last name. The surname Багуслаў is habitual in Eastern Europe, particularly Poland, where it is a widespread surname, Hungary, where it is a rare surname, and Romania. In absolute terms, this name is the most popular in Poland, the United States, and Germany. Much less frequently, Багуслаў is the forename as well as the last name.