Name changing upon getting married was made illegal in 1981 around here, my girlfriend gets pissed when people make the mistake and use my family name to refer to her!
Although I'll be the first to admit that what happened to first Nations and indigenous populations during modern colonization is completely unfair and the reservations system is completely broken and it's recent enough that it's perfectly fair for them to fight it, but claiming you're owed a piece of land because your ancestors (allegedly) got kicked out millennias ago? Nah.
DNA tests show that their ancestors mostly have the same markers found in southern Italian or Sicilian populations.
If a Japanese converts to Judaism, can they claim that their ancestors used to live in Israel? Well, the same logic applies to the European Jews that moved to Israel. They then convinced Jews that are actual descendants of the Levant populations to move to Israel with them, but the first settlers didn't have Israeli ancestors, or didn't have more of them than any other Joe Schmo from Southern Italy
Quebec, makes things much simpler from a record keeping perspective