Danube name meaning "strong, swift" (akin to Sanskrit "iṣiras" "swift"). In Latin, the Danube was variously known as ' or as '. The Dacian/Thracian name was "Donaris" for the upper Danube and "Istros" for the lower Danube. The Thraco-Phrygian name was "Matoas", "the bringer of luck". The Latin name is masculine, as are all its Slavic names, except Slovenian, (the name of the Rhine is also masculine in Latin, most of the Slavic languages, as well as in German). The German "Donau" (Early Modern German "Donaw, Tonaw", Middle High German "Tuonowe") is feminine, as it has been re-interpreted as containing the
Executive Agency for Exploration and Maintenance of the Danube River Executive Agency for Exploration and Maintenance of the Danube River EAEMDR was established as an organization in 1935 under the name “Danube Hydrographical Service” within the structure of the Ministry of Railways. The headquarters were situated in the city of Lom and the responsibilities of the Service were related to the maintenance of the waterway, creation of maps of the Danube River, conduction of hydro meteorological surveys in the Bulgarian section of the river. In 1949, after the ratification of the “Convention for the sailing regime on the Danube River”, the Danube Hydrographical Service passed over to the Ministry of