I have a family bible that belonged to Alexander McDonell who was married to Janet Young in 1836. This bible was in the family home in Sand Point, Ontario but I KNOW through family lore that the McDonells came from Glengarry. I believe Alexander's father was one 'Big Ranald' McDonell. There is also a reference to a Cole McDonell who was Alexander's brother.
If these names fit into your family tree, please contact me.