Kyrgyzstan

"Kyrgyz", is believed to have been derived from the Turkic word for "forty", in reference to the forty clans of Manas, a legendary hero who united forty regional clans against the Uyghers. Literally it means We are forty. At the time, in the early 9th century AD, the Uyghers dominated much of Central Asia (including Kyrgyzstan), Mongolia, and parts of Russia and China.
Kyrgyz is also thought to mean "unconquerable" or "undefeatable".