jello jello (possibly from aymara and quechua "q'illu" yellow, the reduplication indicates that there is a group or a complex of something, "a complex of yellow", "q'illu q'illu" a plant "(berberis bumaelifolia)", is a mountain in the andes of peru, about high. it is situated in the arequipa region, caylloma province, in the districts callalli and chivay. jello jello lies northeast of a higher mountain named huarancante. there is a small lake northwest of the mountain named jello jello.