Traitorfish
The Tighnahulish Kid
Quite a lot, actually- there's something like 1.5 million Italian-Canadians, a number more or less proportional to the US population of 17.8 million, and the same holds true for Jews, Russians, Poles, etc. Even the Irish, who supposedly despised everything British, still ended up there in roughly proportional numbers- 4.4 million against 36.2 million.How much of the 18th and 19th century immigration to places like Canada and other British Empire dominions was by people who were not from the British Empire? The US gained more and more immigrants from all of Europe, and not just British and Irish. I don't know how much that would affect immigration totals.