I wanted to try something like "Pacific Islander", and then tell them I lived on a small island just north of Antarctica, way far into the south Pacific. I'd have a great backstory, too.
Stewart Island/Rakiura, New Zealand - third largest island of New Zealand. Population 400. Southernmost settlement of NZ. There are a few uninhabitant NZ islands further south.
Macquarie Island, Tasmania is much further south but only scientists live there.
The trouble with trying to say you live on a small island just north of Antarctica is anything further south is in the Great Southern Ocean not the Pacific.