It's an interesting question, nationality, I'm from a several generations military family. I have a Grandfather born in Glasgow, some of his brothers were born in Ireland as was his father and some generations before that, but before then back in Scotland
I have an uncle born in British India ( Pakistan) like him the other brothers were born wherever my grandfather was posted.
My father was born in England, a sister born in Ireland, a sister born in cyprus, and a Gaelic speaking hebrides educated, brother born in England.
Both sisters are married to several generations Scotsmen but their married names are from England.
Their children and grandchildren were born in Scotland but one son lives in Canada.
I had uncles and aunts now just cousins in Australia and New Zealand.

From the family trees we have relatives in the USA.
If as is possible, I'm from the royal Stewarts then I'm a descendant of the French or normans or Vikings.

My normal answer is I'm British but European would be more accurate