Sorry, friend, "Caucasian" is the name of that vast group of people derived from the (Indo-European) population that spread out from the Caucasus mountain region about 50-40 thousand years ago. It includes Middle-easterners, Europeans, North Africans, Iranians, Turks, Indians, and some Central Asians.
Here's a stupid map:
http://upload.wikimedia.org/wikipedia/commons/4/41/Neighbor-joining_tree.jpg
Here's a more recent genetic study:
http://graphics8.nytimes.com/images/2007/06/25/science/26human-graphic.gif
