The Isnag, also Isneg or Apayao, live at the northwesterly end of northern Luzon, in the upper half of the Cordillera province of Apayao. The term “Isneg” derives from itneg, meaning inhabitants of the Tineg River. Apayao derives from the battle cry Ma-ap-ay-ao as their hand is clapped rapidly over their mouth. They may also refer to themselves as Imandaya if they live upstream, or Imallod if they live downstream. The municipalities in the Isneg domain include Pudtol, Kabugao, Calanasan, Flora, Conner, Sta. Marcela, and Luna. Two major river systems, the Abulog River and the Apayao River, run through Isnag country.