 Franjo Rački considered that Porga could have been a foreign transcription of the Slavic name Borko.Vladimir Mažuranić noted that it was a genuine personal name which was attested in medieval Kingdom of Croatia at least since 12th as well Banate and Kingdom of Bosnia since 13th century in the form of Porug ("Porugh de genere Boić, nobilis de Tetachich"), Poruga, Porča, Purća / Purča, and Purđa ("vir nobilis nomine Purthio quondam Streimiri").Recently, Serbian historian Tibor Živković argued that the name comes from the Iranian phrase "pouru-gâo", translated as "rich in cattle".