their governor, and in the end concluded that the title ban derives from the "name-title" Bayan, which is also a Persian title word (see Turkish bey for Persian bag/bay), and neglected that it should derive from the Slavic name Bojan. His thesis would be later endorsed by many historians, and both South Slavic titles ban and župan were asserted as Avars official titles, but it had more to do with the scholar's ideology of the time than actual reality. Franz Miklosich wrote that the word, of Croatian origin, probably was expanded by the Croats among the Bulgarians and Serbs, while if it is Persian, than among Slavs is borrowed from the Turks. Erich Berneker wrote that became by contraction from bojan, which was borrowed from Mongolian-Turkic bajan ("rich, wealthy"), and noted Bajan is a personal name among Mongols, Avars, Bulgars, Altaic Tatars, and Kirghiz. Đuro Daničić decided for an intermediate solution; by origin is Avar or Persian from bajan (duke). J. B. Bury derived the title from the name of Avar khagan Bayan I, and Bulgarian khagan Kubrat's son Batbayan, with which tried to prove the Bulgarian-Avar (Turkic) theory on the origin of early medieval Croats. Historian Franjo Rački didn't discard the possibility South Slavs could obtain it from Avars, but he disbelieved it had happened in Dalmatia, yet somewhere in Pannonia, and noticed the existence of bân ("dux, custos") in Persian language. Tadija Smičiklas and Vatroslav Jagić thought that the title should not derive from bajan, but from bojan, as thus how it is written in the Greek historical records (boan, boean). Vjekoslav Klaić pointed out that the title before 12th century is only among Croats documented, and did not consider a problem that Bajan was a personal name and not a title, as seen in the most accepted derivation of Slavic word *korljь (kral/lj, krol). He mentioned both thesis (from Turkic-Persian, and Slavic "bojan, bojarin"), as well the German-Gothic theory derivation from banner and power of ban and King's ban. Gjuro Szabo shared similar Klaić's viewpoint, and emphasized the widespread distribution of a toponym from India to Ireland, and particularly among Slavic lands, and considered it as an impossibility that had derived from a personal name of a poorly known khagan, yet from a prehistoric word Ban or Pan. Ferdo Šišić considered that is impossible it directly originated from a personal name of an Avar ruler because the