Teke is one of the biggest and certainly the most influential tribes in Turkmenistan. Tekes were a part of the Kyzylbashi confederation and that's how their name entered Turkish administrative divisions.
Just as a quick reminder
http://www.chrono-tm.org/?0257042827...00000011000000
They are famous for their horses, the Akhal Teke breed
http://en.wikipedia.org/wiki/Akhal-Teke