The right word is *Caucasian*. Not Circassian. In fact, the term Circassian has never been used as a blanket term for persons of European or white ancestry.
The word Circassian is more appropriately used when talking about a specific ethnic group{i.e. the Adyghe} from the North Caucasus region{largely part of the Russian Federation these days}.
On the other hand, *Caucasian* is sometimes used when broadly speaking about persons of European origin, white people in general or persons from the Caucasus region.
Circassian:
The Circassians, also known as the Cherkess or the Adyghe, are a Northwest Caucasian ethnic group native to Circassia, a region and former country in the North Caucasus.
https://en.wikipedia.org/wiki/Circassians
Caucasian: Caucasian is a term used to describe white people. This includes most people who live in Europe, America, and Australia.
https://study.com/academy/lesson/caucasian-overview-people.html
