http://en.wikipedia.org/wiki/Belojevi%C4%87_noble_family

http://en.wikipedia.org/wiki/Beloje

Beloje (Serbian: Белоје[a]) was the Župan (Lord or Count[1]) of Travunia in the early 9th century,[2] a fief of the Serbian Principality under Prince Vlastimir (r. 836-851). He may have had the position under Vlastimir's predecessors; Radoslav or Prosigoj (fl. 819). Beloje is the first known ruler, or in any case, holder of office in Travunia (a province centered in Trebinje, modern Bosnia and Herzegovina), mentioned in the De Administrando Imperio, by Emperor Constantine VII (945-959).

Sometime after the Bulgaro-Serb War (839-842), Beloje's son Krajina marries the daughter of Vlastimir and receives Travunia as an appanage to rule in his name. Beloje's descendants are entitled the rule of Travunia. There are no more mentions of the family after the Byzantine annexation of Serbia in 969-976.

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http://fmg.ac/Projects/MedLands/SERBIA.htm#VladimirKnezB

VLADIMIR, son of PROSOGOJ [of Serbia] & his wife --- . The De Administrando Imperio of Konstantinos Porphyrogenetos names "Blastemerus" as son of "Prosegoes", recording that he made peace with Bulgaria[13]. Knez [Prince] of Serbia. The De Administrando Imperio of Konstantinos Porphyrogenetos records that "Bulgariæ princeps Presiam" invaded Serbia but made no progress after three years of war[14], dated to before 852 assuming that that is the accurate date of death of Presian of Bulgaria.

m ---. The name of Knez Vladimir's wife is not known.

Knez Vladimir had four known children:

1. daughter . The De Administrando Imperio of Konstantinos Porphyrogenetos records that "Blastemerum Serviorum principem…filiæ suæ" married "Crainan Belae Terbuniæ zupani filium", who were parents of "Phalimeres", father of "Tzutzumeres", naming "Terbuniam, Hormum, Rhisena, Lucabete et Zetlebe" as the towns in Trebinje[15]. m KRAJA Župan of Trebinje and Konavli, son of BELA Župan & his wife ---.