Turk 
(tûrk)
(tûrk)n.
1. A native or inhabitant of Turkey.
2. A member of the principal ethnic group of modern-day Turkey or, formerly, of the Ottoman Empire.
3. A member of any of the Turkic-speaking peoples.
[Middle English, from Old French turc, from Turkish Türk; akin to Old Turkic türk, perhaps from türk, ripe, vigorous, strong.]