The Nervians were well known for the export of grain; an interesting tombstone of a frumentarius was excavated as far away as Nijmegen.
Hainaut was sometimes referred to as the county of the Nervians (comitatus nerviensis) in medieval Latin, and when this came to be politically united with mainly Dutch speaking Brabant again, the counties were still distinguished in the official Latin titles (comitatus Nerviensis atque Bracbatensis).