Hydronymy

thumbnail|300px|right|View of Ben Lomond across [[Loch Lomond]]

A hydronym (from , , "water" and , , "name") is a type of toponym that designates a proper name of a body of water. Hydronyms include the proper names of rivers and streams, lakes and ponds, swamps and marshes, seas and oceans. As a subset of toponymy, a distinctive discipline of hydronymy (or hydronomastics) studies the proper names of all bodies of water, the origins and meanings of those names, and their development and transmission through history.

rivers in the North of the Indian subcontinent and mentioned in the Hindu text Rig Veda

Oldest reconstructed stratum of European hydronymy

Wikimedia list article