A failed expedition to find the Northwest Passage saw the discovery of "Disappointment River" by a third man of this surname.  
One man of this surname attacked the Family Compact in the pages of his newspaper, the Colonial Advocate.  Another man of this surname used his connections with the editor of The Globe, George Brown, and the Pacific Scandal to come to power, wherein he established his country's Supreme Court. The aforementioned Colonial Advocate editor wrote The Caroline Almanack while serving time in prison as for leading the northern portion of an 1837 rebellion also incited by Louis Joseph Papineau.  The first mayor of the city of Toronto shares this name with the second Prime Minister of Canada.  A failed expedition to find the Northwest Passage saw the discovery of "Disappointment River" by a third man of this surname.  FTP give this surname shared by William Lyon and Alexander, the namesake of Canada's longest river.
One man of this surname attacked the Family Compact in the pages of his newspaper, the Colonial Advocate.  
{Mackenzie}