Danube
"Danube" is an Old European river name derived from a Proto-Indo-European "*dānu". Other river names from the same root include the Dunaj, Dzvina/Daugava, Don, Donets, Dnieper, Dniestr, Dysna, Tana and Tuoni. In Rigvedic Sanskrit, "dānu" means "fluid, drop", in Avestan, the same word means "river". In the Rigveda, "Dānu" 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.
Commissions of the Danube River
The Commissions of the Danube River were authorized by the Treaty of Paris (1856) after the close of the Crimean War. One of these international commissions, the most successful, was the European Commission of the Danube, or, in French, Commission Européenne du Danube, the CED, which had authority over the three mouths of the river — the Chilia in the north, the Sulina in the middle, and the St. George in the south and which was originally designed to last for only two years. Instead, it lasted eighty-two years. A separate commission, the International Danube Commission, or IDC, was authorized to control commerce and improvements upriver beyond the Danube Delta and was supposed to be permanent, but it was not formally organized until after 1918.