In the first meeting with Seeker Tresaria, one of the questions she asks is what the first Iksar Shamans called themselves. The answer she is looking for is Organization X, but, according to the book (A Look at Racial Histories, p. 4-5), Organization X had existed for some time and absorbed the Shamans, who, as far as I can tell, didn't call themselves anything at all (other than Shaman).