Claim: Portus Cale was a town whose name was derived from the  Callaeci, Gallaeci or Gallaecia people who were named after the Celtic god Cailleach.
Evidence: The mainstream explanation for the name is that it is an ethnonym derived from the Castro people, also known as the Callaeci, Gallaeci or Gallaecia, a people who occupied the north-west of the Iberian Peninsula. Cala or Cailleach was the name of a Celtic god – in Scotland she is also known as Beira, Queen of Winter – and at the time the land of a specific people was frequently named after its deity. Portus Cale (Latinised version for "Port of Cale", original Celtic name Callaici, Cale) was an ancient town and port in current-day northern Portugal, in the area of today's Grande Porto.