Today is widely recognized the view of both Jasiński and Balzer, that Bolesław most likely was born in the day of King Stephen of Hungary, 20 August 1086.
Hari ini pandangan baik dari Jasiński dan Balzer paling banyak diakui, bahwa Bolesław kemungkinan besar lahir pada hari peringatan Raja István dari Hongaria, tanggal 20 Agustus 1086.