Lazar of Serbia
Vukoslav had two sons, Crep and Držman. Crep was a vassal to Prince Lazar of Serbia, and held the frontier region around Petrus Fortress, in Paraćin. Crep, together with his neighbour noble Vitomir, defeated an Ottoman army at the Battle of Dubravnica on the Dubravnica River near Paraćin on the 25th of December, 1380/1381.