My ggrandmother was Mary Island. She married Alexander Arnold of Essa Twp. in Simcoe County. Alexander Arnold's sister, Mary Ann married John Leighton. Alexander and Mary's daughter, Sarah Jane Arnold married Dr. Robert Leighton Island. To date, I havebeen unable to establish a connection between my Mary and the Islands of Mono Twp. and Orangeville. I'm fairly certain that they must be related. Mary Island came to Canada from Ireland about 1849 at the age of 12. If you see any ties to your Island/Leighton connections, I would love to hear from you.