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.
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. 
