According to the Larouse Encyclopaedia of Archaeology the 'Massaliot' people founded Marseilles - about 600BC - and then moved up the rivers setting up relay stations and trading posts along the banks of the Rhone. Some of these place names are Malpas, Le Pegue, Roquemaure. I found a reference in the University library many years ago to 'land-based' pirates living on the banks of part of the river where rocky hills made it impossible for sailors to escape. This village was called Malpas (bad road perhaps)and is referred as being about 400BC - maybe things had gone down hill trading-wise in the previous 200 years. There was a village called Malpas in Cheshire (UK) and the local top-bods were called Malpas, although when the sons moved away they probably changed their surnames, as was common in the middle ages. Their origin was probably in the Norman Conquest - 1066.