Lake Onega Lake Onega Lake Onega (also known as Onego, ; or ; or ; or ) is a lake in the north-west European part of Russia, located on the territory of Republic of Karelia, Leningrad Oblast and Vologda Oblast. It belongs to the basin of the Baltic Sea, Atlantic Ocean, and is the second largest lake in Europe after Lake Ladoga. The lake is fed by about 50 rivers and is drained by the Svir River. There are about 1,650 islands on the lake. They include Kizhi, which hosts a historical complex of 89 orthodox wooden churches and other wooden constructions
Lake Ladoga The Germanic toponym (Aldeigja → Aldoga) was soon borrowed by the Slavic population and transformed by means of the Old Russian metathesis "ald- → lad-" to . The Old Norse intermediary word between Finnish and Old Russian word is fully supported by archeology, since the Scandinavians first appeared in Ladoga in the early 750s, that is, a couple of decades before the Slavs. Other theories about the origin of the name derive it from "wave" and "wavy"; or from the Russian dialectal word алодь, meaning "open lake, extensive water field". Eugene Helimski by contrast, offers an etymology rooted in German.