Short answers, pulled from the story.
The name Ladoga derives from Old Norse Aldeigja or Aldoga and early Finnic Alodejoki meaning river of the lowlands. Archaeology confirms Scandinavians arrived at the site in the early 750s before Slavic populations settled the area.
Lake Ladoga covers an average surface area of 17,891 square kilometers excluding islands which makes it slightly larger than Kuwait. The lake measures 219 kilometers north-to-south with an average width spanning 83 kilometers and holds a total volume of 837 cubic kilometers of fresh water.
Geological evidence dates the depression back to Proterozoic age as a graben structure that formed part of a marine channel connecting Baltic and White Seas between 130,000 and 115,000 years ago. Deglaciation occurred between 12,500 and 11,500 radiocarbon years BP following Weichselian glaciation while the modern Neva originated when waters broke through Porogi thresholds between 4,000 and 2,000 BP.
Forty-eight forms of fish inhabit these waters including roach carp bream zander European perch ruffe and endemic smelt varieties. An endemic ringed seal subspecies thrives exclusively within Ladoga's boundaries alongside Arctic char populations showing genetic closeness to those found in Swedish lakes Sommen and Vättern.
During much of the Siege of Leningrad from 1941 to 1944 Lake Ladoga provided sole access to the besieged city via winter roads known as Road of Life. Trucks transported goods across ice while boats carried supplies through summer months when Finnish Soviet German and Italian vessels all operated within Ladoga waters simultaneously.