Petrit Latifi

“During the 25-year span that preceded the Turkish invasion, the Albanians were at the height of their power; as regards moral prestige, they had plenty of it. Relating to territories, according to the Byzantine chronicler L. Chalcocondiles, the land of Gjon Castriota, Skanderbeg’s father, extended between the kingdom of Sandalj, king of Bosnia, and Epirus.

N. Iorga mentions a document from the archives of Venice, dating from 1413 which calls Gjon Castriota “dominum partium Bosniae”;   this presupposes that the territories northeast of Shkodra (Scutari) were under Castriota’s sway.

Also, in 1420, Gjon Castriota granted to the inhabitants of Ragusa the privilege to exercise trade in his territories until Prizren,  an indication that this latter town was under Gjon Castriota’s rule. Besides, according to Ami Boue (who points out that between the Greeks and the Albanians the differences are very slight), the Albanians inhabiting Greece were so excited about Skanderbeg’s deeds that in 1454, they would have easily subdued the two despots, Demetrios and Thomas, and Greece would have come under their sway.”

Reference

https://phdn.org/archives/www.ess.uwe.ac.uk/Kosovo/juka2.htm