The so-called "Via Belgica"

[Maiorianus]

I can play devil’s advocate for the sake of conversation.

The only thing that I could think of – and this would be a serious stretch :wink: – is the Via Salaria. This road was named after what it was used for, namely the salt trade. One could argue (quite weakly) that the Via Belgica was used by the Belgae and so was named for its use, just as the Via Salaria.

Edit: is the Via Aquitania a modern name as well? I am not finding it in any Roman sources.

...which makes me think that the naming of roads in Latin based on their use or purpose was not unknown of in the Middle Ages. The example that comes to my mind is that of the "Via Francisca" or "Francigena", the itinerary followed by Frankish pilgrims to travel to Rome. The latin name is not of Roman origin, but is recorded as early as 9th Century AD. So, while not a proper Roman name, "via Belgica" would not be a complete outrage with reference to Medieval Latin

Gabriel