"Caucasians" refer to Armenians and Georgians. Only in the United States do folks continue to use this incorrect and archaic term for white Americans (whether Italian, English, or Syrian) in general.
What is wrong with just plain "white" or "Euro American?"
It's a term which is meant to include a lot of people who are neither American nor European nor white and it is used all over the English speaking world (and probably elsewhere as well).
And there are many other besides Armenians and Georgians who live in the Caucasus who could be called Caucasians.