During the War Within alpha, we encounter the Earthen of Khaz Algar, and can learn some interesting details about them if we stay awhile and listen.
Speaker of the Earthen Dagran, or Dagran Thaurissan II, is the son of Moira Thaurissan and the heir to the Dark Iron throne.
Up until recently, we've known him mostly as a baby, but during the War Within alpha, we get to spend time with young Dagran.
Early on, Dagran meets a Speaker Brinthe, and learns a considerable amount of interesting information about the Earthen of Khaz Algar.
Dagran: Can I ask you another question, Speaker Brinthe? Brinthe: Yes, small one. My current directive is to answer your questions.