The South Slavic realm of the Narentines, a fierce tribe living off piracy, had several recorded rulers in the 9th century:
Drosaico was a zupan (duke) of the Narentines or Marians (chief, lord, count, duke) in ca. 836 to after 839. The Narentines were at the time (823) subordinate to the Serbian Principality. In ca 839 Doge of Venice Pietro Tradonico signed peace with Mislav of Croatia, he then headed with a large fleet towards the Narentines.
Ljudislav (Liuditus sclavus or Liudisclav), possibly a co-ruler, successor, or the same person as Drosaico, had the title of Narentanorum princeps. He allegedly waged a successful naval battle against the Doge Pietro Tradonico, who lost some hundred people, in ca. 840. The Narentines and Venetians subsequently made peace, and Drosaico signed a treaty at the islands, that would stop the piracy against the Republic of Venice.
Under the leadership of Uneslaf and Diodur (Uneslav and Diodor), Narentines plundered the Venetian borders shortly thereafter.
