Radoslav was a Serbian Prince (Knez, Archont) who ruled over the Serbs from 800 to 822, he succeeded his father Višeslav

Višeslav of Serbia

Višeslav was Prince of the Serbs fl. 768-814. He united various Serb tribes into an unified state.-Life:Višeslav was the great-grandson of the Unknown Archont, the leader of the White Serbs that settled the Balkans after an agreement with the Byzantine Emperor Heraclius .He ruled the Županias of...

 who united the Serbian tribes, resulting in the formation of Raška

Raška (state)

Principality of Serbia or Serbian Principality was an early medieval state of the Serbs ruled by the Vlastimirović dynasty, that existed from ca 768 to 969 in Southeastern Europe. It was established through an unification of several provincial chiefs under the supreme rule of a certain Višeslav,...

 (Rascia, modern Serbia

Serbia

Serbia , officially the Republic of Serbia , is a landlocked country located at the crossroads of Central and Southeast Europe, covering the southern part of the Carpathian basin and the central part of the Balkans...

) in the 8th century. His son Prosigoj

Prosigoj

Prosigoj was a 9th-century Serbian Prince that ruled the Serbian Principality from 822 to 836.-Biography:He was the son of Radoslav. Prosigoj or his father was the ruler of Serbia during the uprisings of Ljudevit Posavski against the Franks...

 succeeded him in ca

Circa

Circa , usually abbreviated c. or ca. , means "approximately" in the English language, usually referring to a date...

822.

He or his son was the ruler of Serbia during the uprisings (819-822) of Ljudevit Posavski

Ljudevit Posavski

Ljudevit Posavski was a Croatian Duke of Pannonian Croatia from 810 to 823. The capital of his realm was in Sisak. As the ruler of the Pannonian Slavs, he led an unsuccessful resistance to Frankish domination. He held close ties with the Carantanian and Carniolan tribes and with the Serbian tribe...

 against the Franks. According to the Royal Frankish Annals

Royal Frankish Annals

The Royal Frankish Annals or Annals of the Kingdom of the Franks ,are annals covering the history of early Carolingian monarchs from 741 to 829. Their composition seems to have soon been taken up at court, providing them with markedly official character...

, in 822, Ljudevit went from his seat in Sisak

Sisak

Sisak is a city in central Croatia. The city's population in 2011 was 33,049, with a total of 49,699 in the administrative region and it is also the administrative centre of the Sisak-Moslavina county...

 to the Serbs

Serbs

The Serbs are a South Slavic ethnic group of the Balkans and southern Central Europe. Serbs are located mainly in Serbia, Montenegro and Bosnia and Herzegovina, and form a sizable minority in Croatia, the Republic of Macedonia and Slovenia. Likewise, Serbs are an officially recognized minority in...

 somewhere in western Bosnia

History of Bosnia and Herzegovina (until 958)

Within the boundaries of today’s Bosnia and Herzegovina, there have been many layers of prehistoric cultures whose creation and disappearance are linked to migrations of unidentified ethnic groups.-Prehistory:...

 who controlled a great part of Dalmatia

Dalmatia (Roman province)

Dalmatia was an ancient Roman province. Its name is probably derived from the name of an Illyrian tribe called the Dalmatae which lived in the area of the eastern Adriatic coast in Classical antiquity....

 ("Sorabos, quae natio magnam Dalmatiae partem obtinere dicitur").

Kinship

• Unknown Archont
  Unknown Archont
  The Unknown Archont is a conventional name given by historians to the Serbian leader who led the White Serbs from their homeland to settle in the Balkans after 610, during the reign of Byzantine Emperor Heraclius ....
  
   (~610–641+), Leader of Serbs and their Byzantine Sclaviniae under Heraclius
  Heraclius
  Heraclius was Byzantine Emperor from 610 to 641.He was responsible for introducing Greek as the empire's official language. His rise to power began in 608, when he and his father, Heraclius the Elder, the exarch of Africa, successfully led a revolt against the unpopular usurper Phocas.Heraclius'...
  
  .
  • Unknown lineage of several generations
    • Višeslav (~780-800)
      • Radoslav (~800-822)
        • Prosigoj (822-836)
          • Vlastimir (836-~850)

Sources

• Станоје Станојевић, „Историја српскога народа“, Београд 1989
• Тибор Живковић, „Портрети српских владара (IX-XII)“, Београд 2006 ISBN 86-17-13754-1]