William Lyon Mackenzie
The township of York, which until 1793 had been known as "Toronto", incorporated as a city (meaning it received local self-government) on March 6, 1834, taking the name of "the City of Toronto" to distinguish it from New York City and the dozen other settlements named 'York' in Upper Canada. The Tories and the Reformers fielded candidates for Toronto's first municipal election, held on March 27, 1834, with the Reformers winning a majority on the Toronto City Council. Mackenzie was elected as an alderman. The City Council then met to decide who should become mayor. Mackenzie, after being nominated by Franklin Jackes, defeated John Rolph in the vote and thereby became the first Mayor of Toronto.
Borough
It was previously used in Metropolitan Toronto, Ontario, to denote suburban municipalities including Scarborough, York, North York, Etobicoke prior to their conversion into cities. The Borough of East York was the last Toronto municipality to hold this status, relinquishing it upon becoming part of the City of Toronto on January 1, 1998.