Surname Boryslaw (Борислав 
, Boryslaw 
) , globally, is a rare family name. The cognomen Boryslaw is characteristic of Eastern Europe, particularly Bulgaria, where it is quite a rare surname, Poland, where it is a rare surname, and Belarus, where it is a very rare surname. In absolute terms, it is the most numerous in Eastern Europe, particularly Poland, Bulgaria, and Russia. More frequently, Boryslaw is the forename as well as the last name.