I realize it has been 12 years since your posting, but I think we are both looking into the same family. I have been researching a Daniel Hamill of County Monaghan, who married a Martha McKee in Ireland in 1806. They had a daughter Mary Hamill, baptized in April 1814. Where did you get the birthdate of May 12, 1814? The family emigrated to Canada around 1830, where they ended up in Cartwright Township, Durham, Ontario. Mary Hamill marries John Holmes and continues to live in Cartwright. Sounds like the same family, though the father is named Daniel and was somewhat older, being born in the 1770's.