Jovan Uglješa, Serbian despot
Uglješa Mrnjavčević (Serbian Cyrillic: Угљеша Мрњавчевић; fl. 1346–1371), known as Jovan Uglješa (Serbian Cyrillic: Јован Угљеша), was a Serbian medieval nobleman of the Mrnjavčević family and one of the most prominent magnates of the Serbian Empire. He held the title of despot, received from Serbian Emperor Stefan Uroš V, whose co-ruler - Serbian King Vukašin was brother of Uglješa.