I have often thought of it, but don't know if it would be much use for me. My maternal and paternal line is all Scottish. My paternal Grandfather being born here, a few years of arriving in NZ. My father's mother from Ireland.
Mum always reckoned there was Scanadian on our side, and my late FIL, who knew my father as a young one, told us that he thought there was Spanish somewhere as my father was dark looking.
I am happy with who I am for the time being.... but then there is the niggly thought "What if" etc.
Cheers
KHP