Jovan Dejanović (Serbian Cyrillic: Јован Дејановић), known as Jovan Dragaš (Јован Драгаш), was a Serbian nobleman that held the title of despot under the Serbian Emperor Uroš V, his cousin. He later became an Ottoman vassal after the Battle of Maritsa in 1371. His father, despot Dejan ruled Kumanovo with a district spanning from Preševo to Velbazhd (Kyustendil). After his father's death, the young brothers Jovan and Constantine were taken care of by Vlatko Paskačić, at the order of the Mrnjavčevićs, who continued to rule the region until Jovan reached adolescence.