The Corriebuigh McMillans were five brothers from Corriebuie, Scotland - Angus Donn, Patrick/Peter, Alexander, Ewan/Hugh and Dougald. These brothers emigrated to Ontario, CA in 1792. Previously, they had lived in Delaware County, NY State. During the Revolutionary War, they had proclaimed their allegiance to the British Crown. That cost them their property, their homes and their freedon, as they were interned for the duration of the war, and their property and belongings sold. After being expatriated back to Britain (not Scotland) it took them nine years to earn enough to return and try again.

The Canadian government was offering 200 acre plots of land to anyone who would settle and clear the land. The offerings were prioritized to Empire Loyalists, as these supporters of the Crown were known. All that was required was that the land be cleared and farmed within three years.

The brothers and their families were awarded land grants and settled in Glengarry, Ontario, CA, where their families continued to farm for more than 100 years.