I am trying to find out more about my gr-gr-grandfather, John McMahon, who was born in Monaghan on Feb. 12, 1830 and emigrated to North America (eventually Toronto) in 1846. I don't know where he came from in Monaghan or anything about his parents or siblings. He became a tailor so this might be a clue to his father's occupation. Does anyone researching Monaghan McMahons have a connection with my John? Or any suggestions about where I can look for more information?