Lake Simcoe was renamed by the first Governor of Canada located where in modern times?
modern-day southern Ontario
Title: Beaver River (Lake Simcoe)
Passage: The Beaver River is a river in Durham Region in Central Ontario, Canada.  It is part of the Great Lakes Basin, and is a tributary of Lake Simcoe.  The river's drainage basin is mostly in Durham Region with the remaining portion in the city of Kawartha Lakes; the entire watershed is under the auspices of the Lake Simcoe Region Conservation Authority.
Title: Lake Simcoe
Passage: Lake Simcoe is a lake in southern Ontario, Canada, the fourth-largest lake wholly in the province, after Lake Nipigon, Lac Seul, and Lake Nipissing.  At the time of the first European contact in the 17th century the lake was called "Ouentironk" ("Beautiful Water") by the Wyandot (Huron) people.  It was also known as "Lake Toronto" until it was renamed by John Graves Simcoe, the first Lieutenant-Governor of Upper Canada, in memory of his father, Captain John Simcoe, Royal Navy.
Title: John Graves Simcoe
Passage: John Graves Simcoe (February 25, 1752 – October 26, 1806) was a British Army general and the first Lieutenant Governor of Upper Canada from 1791 until 1796, in modern-day southern Ontario and the watersheds of Georgian Bay and Lake Superior.  He founded York (now Toronto) and was instrumental in introducing institutions such as courts of law, trial by jury, English common law, freehold land tenure, and the abolition of slavery.
John Graves Simcoe Lake Simcoe