Noun
hydronym (plural hydronyms)
(onomastics) The name of a river, lake, sea or any other body of water.
Hypernym: toponym
Coordinate term: oronym
Lenizdat, Leningrad 1974, p. 79 f. Since the beginning of the 14th century this hydronym was commonly known as Ladoga. Source: Internet
The current name dates to a pre-Indo-Europeansfn or pre-Latinsfn theme ab-ên with the suffix -i-ōn(e)sfnsfn This theme would be a hydronym - i.e. a name linked to the river (Rhône), but perhaps also an oronym of terrain (the Rocher des Doms). Source: Internet
Therefore, he considers the primary hydronym Ladoga to originate in the eponymous inflow to the lower reaches of the Volkhov River whose Finnic name was Alodejoki (corresponding to modern Finnish Alojen joki main) "river of the lowlands". Source: Internet