You searched for: “hydronymy”
Proper names of bodies 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, even oceanic elements.
This entry is located in the following units: hydro-, hydra-, hydr-, hyd- (page 10) -onym, -onymy, -onymic, -onymically, -onymous, -onymously, -nym (page 6)