Eleutherius (died 620) was Exarch of Ravenna (615-619). A eunuch, he succeeded John I Lemigius as exarch. Early in his reign, nearly the entire exarchate was unstable. In Ravenna, there was obvious discontent with the Byzantines; in Naples, a certain John of Compsa, separated the city from the exarch's control. Eleutherius defeated him, but the Lombards soon threatened war. Eleutherius was able to sue for peace, promising a yearly tribute. Wikipedia
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