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.
International Commission for the Protection of the Danube River
The ICPDR’ legal basis is the “Convention on Cooperation for the Protection and Sustainable use of the Danube River (Danube River Protection Convention)”, generally referred to as the “Danube River Protection Convention” or “DRPC”. It commits the contracting parties to join their efforts in sustainable water management, including conservation of surface and ground water, pollution reduction, and the prevention and control of floods, accidents and ice hazards. The convention was signed in Sofia, Bulgaria, in 1994 and came into force in October 1998.