History of Toronto
In 1998, the six municipalities comprising Metropolitan Toronto – East York, Etobicoke, North York, Scarborough, York, and the old City of Toronto – and its regional government were amalgamated into a single City of Toronto (colloquially dubbed the "megacity") by an act of the Government of Ontario. This was despite a municipal referendum in 1997 that was overwhelmingly against amalgamation. Subsequently, Mel Lastman defeated Barbara Hall to become the first elected mayor of the megacity.
History of York
The history of York as a city dates to the beginning of the first millennium AD but archaeological evidence for the presence of people in the region of York dates back much further to between 8000 and 7000 BC. As York was a town in Roman times, its Celtic name is recorded in Roman sources (as "Eboracum" and "Eburacum"); after 400, Angles took over the area and adapted the name by folk etymology to Old English "Eoforwīc" or "Eoforīc", which means "wild-boar town" or "rich in wild-boar". The Vikings, who took over the area later, in turn adapted the name by folk etymology to Norse "Jórvík" meaning "horse bay." The modern Welsh name is Efrog.