Danube once appears as the mother of Vrtra, "a dragon blocking the course of the rivers." The Finnish word for Danube is Tonava, which is most likely derived from the word for the river in Swedish and German, "Donau". Its Sámi name "Deatnu" means "Great River". It is possible that "dānu" in Scythian as in Avestan was a generic word for "river": "Dnieper" and "Dniestr", from "Danapris" and "Danastius", are presumed to continue Scythian "*dānu apara" "far river" and "*dānu nazdya-" "near river", respectively. The river was known to the ancient Greeks as the "Istros" (Ἴστρος) a borrowing from a Daco-Thracian
Danube Swabians that their Shwovish or 'Essekerish' could only be understood by those who also spoke Croatian or Serbian. As is the custom in Hungary (as well as southern Germany), Danube Swabians often put the surname first, especially when writing, for example "Butscher Jakob" (see photo of memorial). Danube Swabian villages tend to have relatively few family names as the villagers stem from only a few families, but usually the same family name does not appear in more than a couple of villages, meaning that there are many Danube Swabian family names. The names come from throughout southern Germany, from assimilated Hungarians,