I just stumbled upon your inquiry. I checked my Family Tree and found two John Whethams born in Ontario. Unfortunately I do not have their D.O.B.'s.
1. John Whetham
-son of George Whetham and Mary Grummet
-George came to Canada from Dorset, England
-George's brother was Sir Charles Nathaniel Whetham
-John lived in Kirkham, Ontario
-John had 3 brothers and 1 sister
-John had 5 sons
2. John Whetham
-son of George Stephen Whetham (the first John's brother) of Sheffield, Ontario
-John had 6 brothers and 2 sisters
-my great grandfather was his brother, Charles.
-John had 2 son, William and George.
Hope this helps.