Claim: Portus Cale was an ancient town whose name was derived from the  Callaeci, Gallaeci or Gallaecia people who were named after the Celtic god Cailleach, the queen of winter.
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. The names Callaici and Cale are the origin of today's Gaia, Galicia, and the -gal in Portugal. The word Portugal derives from the Roman-Celtic place name Portus Cale. Cale or Cailleach was the name of a Celtic deity and the name of an early settlement located at the mouth of the Douro River (present-day Vila Nova de Gaia), which flows into the Atlantic Ocean in the north of what is now Portugal.