Tartar - mongolian tribes from central asia who migrated west with the Golden Hordes of Geghis Khan
Most are Sunni Muslim
One fact - Lipka Tartars of Poland/Lithuania, Charles Bronson was a descendent of them
Actually, the Crimean Tatars are largely descended from the various peoples who lived in the area before the Mongols-mainly various Turkic tribes like Kipchaks and Petchenegs, but also Greeks and Goths.