 However, it is considered that some groups already existed since 1520 on the Triplex Confinium (the boundary between Venetian, Ottoman, and Habsburg Empire), but were not directly mentioned in historical documents, rather than were used alternative terms due to social-regional-ethnic-linguistic-cultural reasons such as Uskoks, Morlachs, Morlachi catolichi, Valachi catolichi and catholische Walahen, Rasciani catolichi and Katolische Ratzen (the term had transconfessional meaning), Iliri, Horvati, Meerkroaten, Likaner.In the territory of Croatian Military Frontier happened complex ethnic-demographic integrations, with Ledenice being one of the earliest examples of Croatian-Vlachian-Bunjevac integration when an anonymous priest from Senj in 1696 calls them as "nostris Croatis", while captain Coronini in 1697 as "Croati venturini", at the same time (1693), chiefs of Zdunići in Ledenice emphasized their Bunjevci (Krmpote) ancestry.According to modern and most recent ethnological studies, as well anthroponymy structure, Bunjevci have substantial elements of non-Slavic origin (Vlachian, Albanian) and originate from Vlachian-Croatian ethnic symbiosis of Ikavian Chakavian/Chakavian-Shtokavian language group, with some similarities to Vlachian-Montenegrin symbiosis, but both being more archaic and different to the Vlachian-Serbian symbiosis of Ekavian/Jekavian-Shtokavian group.