Yomumuli is the primordial woman of the Surem, the small, peaceable first people of the hiakim homeland. When a great ash-colored tree began to hum in a strange tongue, none of the Surem leaders could construe it; only Yomumuli understood that it prophesied the coming of the Spaniards, of Jesucristo, and of long strife. Having delivered its meaning she is said to have rolled up the Rio Yaqui and carried it away northward, and to have withdrawn with those Surem who would not face the changes to come. Sources differ on whether she is a single figure or one of a pair of twin sisters with Sea Hamut, and on the full roster of peoples reckoned as her descendants.