TEXAS, ORIGIN OF NAME.The word texas (tejas, tayshas, texias, thecas?, techan, teysas, techas?) had wide usage among the Indians of East Texas even before the coming of the Spanish, whose various transcriptions and interpretations gave rise to many theories about the meaning. The usual meaning was "friends," although the Hasinais applied the word to many groups-including Caddoan-to mean "allies." 

- Texas State Historical Association