Vojnomir, Voynomir or Vonomir I was a Slavic military commander in Frankish service, the duke of Slavs in Lower Pannonia,[1][2][3] who ruled from c. 790 to c. 800 or from 791 to c. 810[4] over an area that corresponds to modern-day Slavonia, Croatia.
The Royal Frankish Annals makes mention of a Wonomyrus Sclavus (Vojnomir the Slav) active in 795.[5] Eric of Friuli, sent Vojnomir with his army into Pannonia, between the Danube and Tisza, where they pillaged the Avars' dominions.[5] According to Milko Kos they were not met with serious Avar resistance, and they conquered many forts.[6][better source needed] The next year the Avars were defeated and Frankish power was extended further east, to the central Danube.[5] Vojnomir's leading position in the campaign has been presumed as very possible with regard to the textual analysis of Annales regni Francorum.[7][better source needed]
His origin and social position are not mentioned in any contemporary medieval source.[8] His identity has been the subject of several hypotheses.[8]