The first written sources that could refer to these areas of southern Pannonia offer information about the Pannonian (Illyrian)-Celtic tribe of the Iasi.
ðə fˈɜːst ɹˈɪʔn̩ sˈoːɹsᵻz ðæt kʊd ɹᵻfˈɜː tə ðiːz ˈɛɹiəz ʌv sˈʌðɚn pænˈoʊniə ˈɔfɚɹ ˌɪnfɚmˈeɪʃən ɐbˌaʊt ðə pænˈoʊniən ɪlˈɪɹiənkˈɛltɪk tɹˈaɪb ʌvðɪ aɪˈɑːsi.