Danube
Classified as an international waterway, it originates in the town of Donaueschingen, in the Black Forest of Germany, at the confluence of the rivers Brigach and Breg. The Danube then flows southeast for about , passing through four capital cities (Vienna, Bratislava, Budapest and Belgrade) before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
Origin of the Romanians
Scholars who reject the continuity theory emphasize that the Romanian names of the large rivers show that the Romanians did not directly inherit them from their Latin-speaking ancestors. According to Vékony (who promotes the immigrationist theory), the Romanian name of the Danube evinces that the Romanians' ancestors lived far from this large river, because otherwise they must have preserved its Latin name, "Danuvius". He also emphasizes that the hypothetical "*Donaris" form is not attested in written sources and "Istros" was the river's native name. According to Schramm, the early Slavs adopted the East Germanic name of the Danube, showing that a predominantly Gothic-speaking population inhabited the territory between the Slavs' homeland and the Lower Danube before the Slavs approached the river in the 5th century. Vékony proposes that the Romanians adopted the river's Cuman name, "Dunay", when they reached the Danube during their northward expansion around 1100. In Schramm's view, the phonetic changes from ""s"" to ""ʃ"" in the names of five large rivers also contradict the continuity theory, because Latin did not contain the latter consonant, thus only non-Romanized natives could transmit it to the peoples who settled in the north-Danubian regions after the Romans abandoned them. Similarly, historian László Makkai says that the change from ""a"" to ""o"" shows that a Slavic-speaking population mediated the ancient names of three large rivers to modern populations (including Romanians), because this vowel shift is attested in the development of the Slavic languages, but is alien to Romanian and other tongues spoken along the rivers. Linguists (including some proponents of the continuity theory) also accept a Slavic mediation which is undeniable in specific cases.