Gradinja is one of many persons (alongside Branislav, Gojislav, Georgije and Grubeša among others) mentioned only in the Chronicle of the Priest of Duklja (CPD), not found in Byzantine sources as the other Serbian rulers and royalty.
Gradinja is among numerous people (Branislav, Gojislav, Georgije, and Grubeša included) who appear only in the Chronicle of the Priest of Duklja (CPD), but are not documented by Byzantine sources as part of the Serbian aristocracy.