Mentioned in the inscription for Voihna from 1362/1374 and in the colophone of the manuscript of Lětovnik from 1386, which is now in the Synodal library manuscript collection (Nr. 148) in the State Historical Museum. He appers as a blagočьštivь i hristoljubivь gospodinь in the colophone. Voihna worked for him as a courtier before 1362/1374 († a se ležitь rabь boži Voihna dvoraninь Radovanovь mladь prěstavi se k.e. dьnь i bogь da prosti). He was the sponsor of the slavic version of the chronicle of Georgios Monachos (the so-called Lětovnikь). He commisioned in 1386 Rōmanь and Vasïlь, the scribes and monks from the Hilandar Monastery, to copy the manuscript. Rōmanь and Vasïlь wrote a colophone, where they anticipate Radovanь enjoying the lecture of the book in his house (I ispisa se sija kniga, lětopisьcь, vь Svetěi Gōrě, vь ōbytěli svetyje i carьskyje i čьstnije lavry prěsvetije bogorodice Hilandara blagočьštivomu i hristoljubivomu gospodinu Radovanu, ponježe vьshotě iměti siju knigu vь domu svojemь, i naslaždati se pročitanijem ōt njeje minuvšïih drevnïih car ōt Adama daže do potopa, i ōt potopa do Hrista, po Hristě blagočьstivyih carь i svetyih i duhovnosnïih mužïi daaže do carьstva Konstantina Irïnina syna. I togda igumьnьstvujuštu vь tomžde monastyri Hïlandari mitropolitu carьskago grada sěra kyr Savě, i pri njem ispisa se povelěnijem i potьštanijemь jaže ō njei ljubve radi gospodina Radovana čьstnomu starcu kyr Ïōasafu rukama mnogogrěšnih i směrennyhь taha monahь Rōmana i Vasïlïa).