There is a Cookstown, Simcoe County, Ontario, is this where George was born?

There is also this census but the whole family is shown as born in Ireland:

1881 Census of Canada
Name: George Robert Frazer
Gender: Male
Age: 4
Birth Year: 1877
Birthplace: Ontario
Religion: Church of England
Nationality: Irish
Province: Ontario
District Number: 138
District: Simcoe South
Sub-District Number: F
Subdistrict: Essa
Division: 2
Household Members:
Name Age
William Frazer 50
Maryjane Frazer 45
William John Frazer 18
Jane Elizabeth Frazer 16
Archable Frazer 14
Wilson Frazer 11
Anna Maria Frazer 9
James Stanly Frazer 7
Caroline Frazer 6
George Robert Frazer 4