摘要：The oldest geographical names on Croatian territory, pre-Slavic toponyms, are those which existed there before the arrival of Slavic tribes in the 6th/7th century. The only certain criterion for defining a Croatian toponym as pre-Slavic is its attestation in ancient sources, i.e. in texts and inscriptions dating prior to the arrival of the Slavic tribes. The aim of this paper is to contribute to the methodology of researching Croatian pre-Slavic toponyms which have not been attested in ancient sources. This paper studies the names of Croatian rivers longer than 50 km which were not recorded in ancient sources, but are considered to be of pre-Slavic origin. These are Bednja, Cetina, Korana, Krapina, Krka, Lonja, Mura, Odra, Pakra, Sutla, and Una. For each river-name, historical (mediaeval) records are cited and etymological analyses are given. An attempt is made to state whether the name can be considered of pre-Slavic origin or how probable its pre-Slavic origin is.
