[Capsicum]

If you include not just the British-descended Loyalists and their descendants, but anyone who lived in the US (whether in colonial days or up to the last few generations) prior to moving up to Canada, ranging from the early days when some Anglo-Canadians were descended from those living in the Thirteen Colonies, to later on (eg. German Americans who settled in Waterloo like the Mennonites, or Italian Americans who arrived to Montreal via Ellis Island, or black Canadian descendants of those who travelled the Underground Railroad, even some Chinese Canadians came to BC from California, all the way to Vietnam war draft dodgers and American expats who decided to settle in Vancouver or Toronto), could it be possible that a majority of Anglophone Canadians at least have "American" ancestors?

Rather than descent from someone from arrived straight from the Old World (be it Europe, or later on, non-European locales) and then landed in Canada without having any family ties to a settler or immigrant south of the border.