i was just reading a wiki article about aboriginees/native peoples, and the thought crossed my mind - "hey, arent i native to somewhere?" pretty much my whole family history came from ireland/england/scotland/UK/britain. does this mean i would be an aboriginee in that country?
I think what makes the Aborigines unique is that they were mostly confined to, and 'protected' by, their island home. I.e., they didn't much migrate nor have immigrants until relatively recently.
OTOH, for those of us with roots in Europe our ancestors did migrate extensively and were intermixed (or whatever term one prefers) with many other folks. E.g., you reference Celtic ancestry. From what I've read they are Proto Indo European peoples originating in either the Pontic Caspian steppe region or Anatolian region and subsequently migrated Westward. And clearly through history were invaded and intermixed with other peoples.
BTW: The aborigines are thought to have broken off from others about 70,000 yrs ago. So, we are related, as are all peoples.
Also, the Aborigines are also said to have inhabited Australia only about 25,000 yrs ago.
http://www.bbc.co.uk/news/science-environment-15020799
It seems to me if one wants to claim some type of ancestral home one must choose a time frame and that strikes me as kind of arbitrary although it's done often. E.g., many here claim Scotland or Ireland as their ancestral home but if you look further you can trace the roots further East (Western Russia/Turkey etc.)
TL;DR - People migrate all over and intermingle. So, we're all related and in a sense each of us are aborigines from everywhere. But if you want to chose "ireland/england/scotland/UK/britain" go ahead. Nothing wrong with it.
Fern