Vonko (fl. 1400-1401) was a "Serb-Albanian-Bulgarian-Vlach" who conquered Arta from the Spata family in 1400, holding it until late 1401, when the Spatas regained the town. Not much is known of him. In a Greek monastic chronicle, the Chronicle of Proclus and Comnenus (also known as the Chronicle of Ioannina) from the at Ioannina, the last inclusion mentions: "October 29, on Wednesday (1400), Despot Spatas enters Eternity (dies). Immediately afterwards, his brother Sgouros holds Arta. After some days, the Serb-Albanian-Bulgarian-Vlach Bokoes (Vonko) attacked and expelled Sgouros, and started to round up all the elders and imprisoned them in the fort, and he destroyed their possessions." He treated the citizens badly, and they called on the Republic of Venice for help.