Other, distinct polities also existed near the Croat duchy. These included the Guduscans (based in Liburnia), the Narentines (around the Cetina and Neretva) and the Sorabi (Serbs) who ruled some other eastern parts of ex-Roman "Dalmatia". Also prominent in the territory of future Croatia was the polity of Prince Liutevid, who ruled the territories between the Drava and Sava rivers ("Pannonia Inferior"), centred from his fort at Sisak. Although Duke Liutevid and his people are commonly seen as a "Pannonian Croats", he is, due to the lack of "evidence that they had a sense of Croat identity" referred to as "dux Pannoniae Inferioris", or simply a Slav, by contemporary sources. However, soon, the Croats became the dominant local power in northern Dalmatia, absorbing Liburnia and expanding their name by conquest and prestige. In the south, while having periods of independence, the Naretines also "merged" with Croats later under control of Croatian Kings.