An American who spends a lot of time in Europe and often longs for the European lifestyle when they are home in America.

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.

An American who was either born an expat in Europe and grew up there as a dual national, or born in America and raised there, or one who has lived there for as long or longer than s/he lived in the States. Probably speaks at least three languages without an accent, like a local.