Dr. John Carlyle MacWilliam was born in Parry Sound, Ontario on the 13th of June 1914. His parents were John MacWilliam and the former Sarah McLachlan. He had a brother named Douglas. His family moved to London, when he was a child and he was educated in local schools. He attended the University of Western Ontario in London and he graduated M.D. in 1939. He interned at Private Patients Pavilion, Toronto General Hospital and St. Joseph’s Hospital in London, Ontario. Dr. MacWilliam started his practice in Chatham, Ontario in 1941. Dr. MacWilliam is listed in the 1941 Shepherds City of Chatham Business Directory. At that time his office was located at 47 King Street.
He married Doris Truan, a registered nurse who had graduated from the Public General Hospital School of Nursing in 1942. She was born in Wallaceburg, Ontario on the 21st of February, 1921 the daughter of James Truan and the former Pearl Innis. She had an older brother, Donald and a sister named Jean. Dr. and Mrs. MacWilliam were the parents of two daughters, Elizabeth and Heather.
Dr. MacWilliam was the Medical Director of Thamesview Lodge, District Medical Officer for the C.N.R., Medical Doctor for the Kent County Jail and Past President of the Kent County Medical Society. In 1944, his office was located at 44 Third Street in Chatham.
He retired after practicing medicine for over 45 years. Dr. MacWilliam enjoyed golfing and boating.
Mrs. MacWilliam died on the 23rd of February, 1999. Dr. MacWilliam died on the 9th of December, 2006 at the age of 92 in London, Ontario. They are both buried at the Maple Leaf Cemetery in Chatham.