Dr. Duncan Colin Leitch was born in 1843 in Yarmouth Twp, Elgin County. His parents were Colin Leitch and the former Nancy Ann McLarty. He had 2 brothers, Malcolm and Archibald.
Dr. Leitch married Susan Long on the 22nd of September, 1859 in Elgin Co. At the time of his marriage to Susan Long, he was a school teacher in Yarmouth Twp. Mrs. Leitch was born on the 4th of December, 1850 in Dumfries Twp, the daughter of Charles and Catherine Long and her parents were farmers. According to the 1871 Canadian Census, Dr. and Mrs. Leitch were living in Yarmouth with their 1 month old son, Arthur and Dr. Leitch was still teaching school. Dr. and Mrs. Leitch also had 2 daughters born to them after he completed medical school, Annie Catherine (1876) and Margaret Blanche (1879).
Dr. Leitch graduated M.B. from Trinity College in Toronto in 1874. He also graduated M.D. from the Long Island Medical College in 1874 and became a member of the Ontario College of Physicians and Surgeons in 1874. At the time of his registration with the College of Physicians and Surgeons, Dr. Leitch listed his residence as Duart, Ontario. Dr. Leitch appeared in the 1885 Ontario Business Directory and he is listed in Duart, but there is a misspelling of his name, as it lists him as Dr. “J.” C. Leitch.
Dr. Leitch died on the 17th of February 1891 and he was buried at the Fairview Dutton Cemetery in Elgin Co. He was 47 years old. Mrs. Leitch died on the 1st of April 1902 at the age of 52 and she was buried beside her husband at the Fairview Dutton Cemetery.
*Their son Dr. Arthur Leitch became a physician and practiced medicine in Michigan.