"Stefan Dragutin (Serbian: Стефан Драгутин, Hungarian: Dragutin István; c. 1244 – 12 March 1316) was King of Serbia from 1276 to 1282. From 1282, he ruled a separate kingdom which included northern Serbia, and (from 1284) the neighboring Hungarian banates (or border provinces), for which he was unofficially styled as "King of Syrmia". He was the eldest son of King Stefan Uroš I of Serbia and Helen of Anjou. He received the title of "young king" in token of his right to succeed his father after a peace treaty between Uroš I and Béla IV of Hungary who was the grandfather of Dragutin´s wife, Catherine, in 1268. He rebelled against his father and forced him to abdicate with Hungarian assistance in 1282." - (en.wikipedia.org 31.01.2020)
