[Boogieman]

venti = 20 and miglia = miles so yeah, seems like it means “20 miles”.

Seems like there is a town called “Ventimiglia” in Italy, so I suppose it was 20 miles from something notable.

[Verginius Rufus]

According to Wikipedia, Ventimiglia is on the Ligurian coast of Italy, 81 miles southwest of Genoa, 4.3 miles from the current border with France. Formerly it was 20 miles from the French border, but the name has nothing to do with twenty miles. It is a corruption of the original Album Intimilium.

Traveling around Italy by train I'm always amazed at how many places are named Sottopassaggio. Every train station seems to have one nearby.