It's interesting Nabakov is thought of as American. Yes, an American citizen beginning age ~46 (in 1945) but born in Russia, wrote in multiple languages, lived much of life in Europe.

I write him down as American because that's his elective nation, although he's quintessentially European.

After all you might not chose where you live, but how you live and where you die can be up to you. And as far as I can I try to respect what people chose for themselves.