The town's name is derived from theBulgariancherna voda (черна вода inCyrillic), meaning 'black water'. This name is regarded by some scholars as acalque of the earlierThracian nameAxíopa, fromIE *n̥ksei 'dark' andupā 'water' (cf.Avestanaxšaēna- 'dark' andLithuanianùpė 'river, creek').[3]
Cernavodă was founded under the nameAxiopolis by the ancientGreeks in the 4th century BC as a trading post for contacts with localDacians.[citation needed] A Roman fort was built as part of the defensive frontier system of theMoesian Limes along the Danube.
The railroad fromConstanța to Cernavodă was opened in 1860 by theOttoman administration.
Cernavodă was one of the capitals of the short-livedSilistra Nouă County (1878–1879).