The "Europäische Stammtafeln: Stammtafeln zur Geschichte der Europäischen Staaten" (1978) by Detlev Schwennicke, reports Radoslav betrothed to Theodora Komnene c. 1217. She was a daughter of Michael I Komnenos Doukas, ruler of Epirus. Both of his wives were members of the Melissenos family. Uncertain which of the two was her mother. Fine indicates Radoslav would instead marry her first cousin Anna Doukaina Angelina in 1219/1220. She was a daughter of Theodore Komnenos Doukas and Maria Petraliphaina. The "Europäische Stammtafeln" reports the marriage resulting in the birth of a single child. The name is not listed and Charles Cawley, a modern genealogist, has been unable to find primary sources on the existence of the child.