Stephen Constantine of Serbia

Stefan Konstantin was the King of Serbia from 29 October 1321 to the spring of 1322. The younger son of King Stefan Milutin (1253–1321), he initially held the appanage of Zeta, and was the heir to the Serbian throne after his father had exiled his elder brother Stefan. After his father's death, a throne struggle broke out between Konstantin, Stefan and their cousin Vladislav II, evolving into the two years long civil war. He was killed in the battle fighting his brother, who went on to defeat Vladislav, too, and gained the Serbian throne as Stefan Uroš III, better known as Stefan Dečanski.