House of Aviz
During the reign of Henry III there was a greater Portuguese exodus to Castile, the common factor of which was the rejection of the House of Aviz, and the Castilian King granted the exiles some compensation for their losses in Portugal. These exiles would reject good relations between the Kingdom of Castile and the House of Aviz, and also tended to maintain networks of kinship consistent with their allegiances, and thus the exiled adherents of Beatrice settled in cities where the Dowager Queen had influence, like Toro or Valladolid.