Vuk is considered to be a progenitor of Bosnian noble family, the Kosačas, one of the most prominent during the 14th and 15th century Bosnia.
Ragusan chronicler Mavro Orbini (1563–1614), write that Vuk was born in 1317, as son of an unnamed knyaz from Rudine, in eastern Bosnia, in Podrinje on the left bank of the Upper Drina river, where his father held a possessions.
[1] Vuk is considered to be a progenitor of a Bosnian noble family, the Kosačas, which will become one of three most influential in the Banate and Kingdom of Bosnia during the 14th and 15th century.
After reconciling with the relatives of Branko, he joined (or returned to[4]) the court of Emperor Stefan Dušan.
[3][2] Vlatko was a celebrated military commander in the service of Bosnian ban and later king, Tvrtko I, who elevated him to a rank of the Grand Duke of Bosnia and awarded him with a land of Hum.