1. 
   hydronym
   hydronym, hydronyms A name of a body of water or rivers, lakes, and oceanic elements.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1009/10
   
   
2. 
   Hydronym
   A hydronym (from ὕδωρ, hydor, "water" and ὄνομα, onoma, "name") is a proper name of a body of water. Hydronymy is the study of hydronyms and of how bodies of water receive their names and how they are transmitted through history. It can apply to rivers, lakes, and even oceanic elements. ...
   Found op http://en.wikipedia.org/wiki/Hydronym
   
   
3. 
   Hydronym
   a name given to a body of water. Example: The Nile.
   Found op http://www.babynames.com/Names/glossary.php
   
   

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