Vonko (fl. 1400-1401) was a "Serb-Albanian-Bulgarian-Vlach" that conquered Arta from the Spata family in 1400, which he held until late 1401, when the Spatas regained the town. Not much is known of him. In a Greek monastic chronicle "Chronicle of Proktos and Comnenus" (Chronicle of Ioannina) from the Panteleimon monastery at Ioannina, 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 chieftains/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.