The Kajkavian toponym "Medžimorje" is believed to have been the original name of the region. It originated in the 6th or 7th century, which makes it older than the Latin toponyms that were first mentioned in feudalism. The name "Medžimorje" is derived from the Proto-Slavic preposition "medji" and the noun "morje". It literally means "land surrounded by water", i.e. "island". "Međimorje" is also an archaic common noun that was used in Kajkavian Croatian, also meaning "island". However, the names "Međimurje" (Shtokavian Croatian), "Muraköz" (Hungarian), and "Murinsel" (German) all contain the hydronym "Mura" (or "Mur"). The name "Murinsel" means "island on the Mura". This led to some dilemmas in the usage of the Croatian names "Međimorje" and "Međimurje". In Kajkavian Croatian the name is "Medžimurje", or "Medžimorje", and in the Prekmurje dialect it is "Medmürje" or "Nedžimurje."