I see on the 1851 census of St. Malachy, Beauharnois, Canada East (now Quebec, Canada) that John Kerry, 22 years old, carriage maker was enumerated adjacent to others of the same surname, apparently a family. John was born in England, and those 14 and under were born in Canada. The apparent father is Robert Kerry, age 46. I can help more if you think this is the same person.
Judith