Hypothetically, each work can be allocated to one of several real Kirills and Cyrils: Cyril of Jerusalem (ca. 315-386); Cyril of Alexandria (d. 444); Cyril of Scythopolis (mid-sixth century); Constantine-Cyril, apostle of the Slavs(d. 869); Metropolitan Kirill I of Kiev (1223–1233); Metropolitan Kirill II of Kiev (1243–1290); Bishop Kirill of Rostov (1231–1262); Kirill of Turov.
In consequence of Iaroslav's early death, his descendants forfeited any right to the Kievan throne and had to content themselves with Turov and Pinsk.