Vojnomir
Vojnomir, Voynomir or Vonomir I was a Slavic military commander in Frankish service, the duke of Slavs in Lower Pannonia, who ruled from c. 790 to c. 800 or from 791 to c. 810 over an area that corresponds to modern-day Slavonia, Croatia.
The Royal Frankish Annals makes mention of a Wonomyrus Sclavus active in 795. Eric of Friuli, sent Vojnomir with his army into Pannonia, between the Danube and Tisza, where they pillaged the Avars' dominions. According to Milko Kos they were not met with serious Avar resistance, and they conquered many forts. The next year the Avars were defeated and Frankish power was extended further east, to the central Danube. Vojnomir's leading position in the campaign has been presumed as very possible with regard to the textual analysis of Annales regni Francorum.
His origin and social position are not mentioned in any contemporary medieval source. His identity has been the subject of several hypotheses.
Hypotheses
Vojnomir remains an enigmatic historical personality. Even the correct reading of his name is unclear. Instead of Vojnomir the original Wonomyro could also be read as Zvonimir, just like the name of the Croatian king Demetrius Zvonimir has been corrupted in Svinimiro. Some authors interpret Vojnomir as having been a Croatian duke, a military leader of the Frankish army, or the prince of Carniola. There are three most reliable hypotheses about his origin: the "Pannonian hypothesis", the "Career hypothesis" and the "Carniolan hypothesis". At least two explanations could be read in the context of modern nationalistic mythology: Slovene and German authors from the Austrian part of Austria-Hungary are prone to support the Carniolan origin and Croatian authors are prone to support the Pannonian or the Istrian origin.Pannonian hypothesis
According to the Pannonian hypothesis, Vojnomir was a knez of the Slavs in Lower Pannonia from ca. 790 to 800 or from 791 to ca. 810. He is believed to have fought the Pannonian Avars during their occupation of what is today northern Croatia; according to Francis Dvornik, he launched a joint counterattack with the help of Frankish troops under King Charlemagne in 791, successfully driving the Avars out of Croatia. In return for the help of Charlemagne, Vojnomir was obliged to recognize the Frankish sovereignty and convert to Christianity.On Christmas Day in 800, a year after the Siege of Trsat, the Pope Leo III crowned Charlemagne as Imperator Romanorum in Saint Peter's Basilica. Nicephorus I of the Byzantine Empire and Charlemagne of the Holy Roman Empire settle their imperial boundaries in 803. Following these events, known as the Pax Nicephori, the Duchy of Croatia peacefully accepted limited Frankish overlordship. Contrary to Croatia, after the death of duke Vojnomir, the former Frankish ally Lower Pannonia led a resistance to Frankish domination under the leadership of duke Ljudevit Posavski.
Fine Jr. claimed that Vojnomir was a Croatian duke who aided Charlemagne's major victory against the Pannonian Avars in 796, after which the Franks were made overlords "over the Croatians of northern Dalmatia, Slavonia and Pannonia".