Also -briga. Celtic prefix and suffix of Proto-Indo-European origin meaning fortress, high city, high place, castro, fortified hill, almost always associated with place names or pre-Roman cities investigated by archaeologists. We have many examples such as Segóbriga near Saelices in Cuenca, Amallóbriga, mansio of the Via XXIV of the Antonino itinerary, in Tiedra (Valladolid), Brigantium coinciding with La Coruña, Brihuega in Guadalajara. . . .
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