アイマラ語
Phaq'u Q'awa derives from Aymara language terms , , or meaning the color light brown, reddish, fair-haired, or dark chestnut, and meaning little river, ditch, crevice, fissure, or gap in the earth, the name thus meaning "brown brook" or "brown ravine". The Hispanicized spelling is "Pacocahua" or "Pajojañua".