The Gallaeci or Callaeci were a Celtic people who inhabited Gallaecia, the north-western corner of Iberia, a region roughly corresponding to what is now Galicia (Spain), northern Portugal and Western Asturias, before and into the Roman period. They spoke a Q-Celtic language related to Celtiberian, usually called Gallaic or Northwestern Hispano-Celtic, which also shows other linguistic influences, mainly Lusitanian.
The region was annexed by the Romans in the time of Caesar Augustus during the Cantabrian Wars, a war which initiated the assimilation of the Gallaeci into Latin culture.
Read more about Gallaeci: History, Archaeology, Political-territorial Organization, Origin of The Name, Gallaecian Language, Gallaecian Deities