As an aside, not an attack on you, no-one should really be using the term "Caucasian" nor really expecting anyone outside the US to understand it.
It's an outdated, not-just-inaccurate-but-outright-wrong and inherently racist term based on weird pseudo-scientific myth-making from literally the 1700s! I understand that even in the US it's being increasing deprecated. "White" may seem more stark but it's more accurate/useful (in so much as any racial classification is, which is to say, mainly to the authorities).
en.wikipedia.org
I remember when I first really came across it (I'm sure I'd heard it in movies/cop shows but it hadn't quite registered) in the 1990s as a teenager, and realized that's genuinely what a lot of Americans were saying instead of "White" and like, the Federal state was using it as an official term, even though like nowhere else did (I hear Australia used to a bit). Even then it was an insane term to me because I'd read up on a lot of kook racial science as a teenager, trying to work out what the hell was wrong with people - racists, specifically - where they were getting these weird and incredibly obviously wrong ideas!
Hah I bet! That's fascinating re: the Krewes.