Pannier is derived from andalusi Arabic el-khurga and East of the Arabic Al hury ( 41 bag; As well said mate Pedro Crespo, bags tend to be of strong canvas or wool cloth or a cloth to carry food or any objects on the horses or two-wheeled vehicles. Before people, used them as witness the tale two panniers of Aesop, Greek fabulist of the 6th century a. d. C. Prometheus, the trainer of men, endowed to each of two saddlebags, the forward for other defects and on the back for their own. Why we see easily outside failures and we are blind to their own. What happened to Prometheus!
alfotja is incorrectly written and should be written as "SADDLEBAG. Preferable SADDLEBAGS"being its meaning:
Common female name. Much more used in the plural. It is a tool of transportation formed by two homers, more or less large cavities, made from strong fabric such as canvas. Come together with a strip of the same material to be distributed symmetrically one on each side. Used for walkers, the horses, motorcycles and bicycles.