1957, Scottish Studies - Volumes 1-2, As references to foreign hydronymies have shown, this semantic structure and development is not confined to Scotland or to the British Isles.
1989, Jan Gijsbert Pieter Best & ‎Manny M. W. De Vries, Thracians and Mycenaeans, In hydronymy there are many pairs of river names such as Eau Blanche/Eau Noire in France, Blanc Ruxel/Noir Ruisseau in the Vosges, France, Beli Iskdr/Cerni Iskdr in Bulgaria, Crisul Alb/Crisul Negru in Romania.
2007 , Helmut Birkhan & ‎Hannes Tauber, Kelten-Einfälle an der Donau, Hydronymy marks the most conservative feature of toponomastics. By hydronymy earlier strata of a population might be identified and the movements of prehistoric peoples can be observed assessing the spread of the hydronymy associated with them.
