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
Waves of the Danube known as "Danube Waves Waltz." The melody of "Waves of the Danube" was used in what is regarded as Korea's first popular song, "In Praise of Death" by Yun Sim-deok recorded in 1926. The song was recorded in Osaka, where she met and fell in love with a Korean married man. The two boarded a steamship returning to Korea, but ended their lives by jumping into the sea. "Waves of the Danube" became known in the United States only half a century later. Al Jolson and Saul Chaplin published it in 1946 under the name of "The Anniversary Song" ("Oh,