portaticum

• portāticus, portāgium

Depending on the sense, either from portus (“harbour”) or porta (“gate”) +‎ -āticum. Attested from 681 CE.^[1]

portāticum n (genitive portāticī); second declension (Early Medieval Latin)

1. gate tax
2. harbor tax

Second-declension noun (neuter).

• Galician: portádego, portádigo
• Old French: portage (see there for further descendants)
• Italian: portatico
• Leonese: portalgo
• Old Spanish: portadgo
  • Spanish: portazgo

• "portaticum", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)