Mars Barr - that would be NAPANEE, Ontario. And for others ...
From my own research on Irish ancestors, (among the million or more who left Ireland in famine) most of them settled in Ontario and some in Quebec. I gather from extensive research that many farm workers travelled quite freely back and forth over the border for work, marrying willy nilly - each other, canadians, americans ... unlike today with our soon to be armed customs gates! I did find a skeleton in my closet ... a Great Grandad who had 7 children, one of whom was right in the middle and was illegitimate ... so the entire family sort of disappeared from the records for a bit, very hard to trace.
It takes a lot of work and imagination. For example I know that my grandfather Collier moved to Medicine Hat, Alberta, from County Erin, Ontario around 1903 - so I typed in search "postmasters canada" as I knew he was one, and found a most interesting list in Canadian archives. I have written to all the Colliers still in that area and have had no replies. Disappointing, but .... never give up. If you have any idea what city or county your ancestors may have emigrated to, just type that and province in your search box. You never know.