Just learned about a Canadian descendant in the 24th Century

It's not just Canadians. Sooooooo many people south of the border tell me they had a "great grandmother who was a [pick a tribe, usually Cherokee]." Even my wife believed it because her mother swore it until she took a DNA test. Her mother still swears it after the DNA test.

lol .... I'm up in northern Ontario in Canada. I'm Indigenous and I know because its my family and community that my area is completely Ojibway. Parts our area can also be known as Ojibway/Cree or Oji-Cree because we start mixing with the Cree in the north. Then down below us are the Algonquins and closer to the Great Lakes everything gets terribly mixed but there is a large majority of Ojibway throughout.
I have had several people in my area in Sudbury / Timmins / North Bay come up to me and tell me that they have Native ancestry and more than a few of them have claimed to have Cherokee, Sioux or even Mohawk ancestry, claiming that their family has always been in the north for generations. All tribes that had never been part of our part of the country. I had an old French Canadian friend who proudly told me that his grandmother was a Cherokee princess even through his French Canadian family had never come from the American midwest.
Personally I've given up on all this crap and just nod, don't argue and just treat people nice and never ask them about it all again. I grew up being made to feel less than others because I was 100% Native only to end up at this point in my life where I meet lots of people with no ancestry wanting to be 10% Native.
- You are considered "cool" now.
  I mean, you always were who you were, but now they finally acknowledge it. So... that's "good", I guess?
  Meh, at least it will be for future generations, and that's not nothing. :-)
- I just... why is it almost always Cherokee? You'd think North America was 99% Cherokee before Europeans came.
In the Appalachians especially, it became a thing to claim native ancestry to try and hide black ancestors, both as an ancient claim to the place they're proud to live in and, yes, as some pretty blatant racism.
- Interesting. I had never heard that before.

My ancestry is 0.04% Vulcan, the DNA test says so. Don't believe me? We can settle it with a game of three-dimensional tic-tac-toe.

I was going to debate you on that ... but seeing as you are 0.04% Vulcan ... I have already lost
I wasn't born on Vulcan, but I was later vulcanized.
- I feel like claiming Vulcan citizenship is just the latex trend. Given your un-Vulcan writing style, I believe I caucho in a lie. This really rubbers me the wrong way.
Can I go first?
(I take the center cube.)

Even if the nation of Canada ceases to exist, I suspect we would still call the region and people Canadian.

People still call themselves Welsh almost 500 years after the Laws in Wales Acts of 1535/1542.

At the risk of controversy ... it makes me wonder if some of them will refer to themselves as French-Canadian ..... Calais!
It still useful as a place name, and probably an administrative subdivision of the United Earth government.
Wales is considerably older than Canada. Canadian national identity is barely over 100 years old.