The Noble Johnston in our family line born in Enniskillin, Fermanagh in 1829 was recorded in the 1851 census of Ontario as living in York with the trade of cooper. He married Margaret Young in Toronto in 1855. He moved to Blanshard Twp., Perth county to take up farming. He often led the Orangeman parade in St. Marys, Ontario. His obituary noted a brother, Robert of Shelburne, Ontario and a sister, Mrs. Hall of Woodstock. His brother's marriage record shows the parents to be Robert Johnston and Jane. If we're talking about the same individual, I hope this helps.