What is "matilo"

Matilo or Matilone was once a Roman fort ( castellum) in modern-day Leiden. Positioned on the southern banks of the Oude Rijn, it served to protect the Roman borders in the province of Germania inferior ( Limes Germanicus). On the Peutinger map, it lies between the encampments of Albaniana ( Alphen aan den Rijn) and Praetorium Agrippinae ( Valkenburg). The seventh-century Ravenna Cosmography gives its name as Matellionem.