Badajoz

Badajoz (a city and municipality, the capital of the province of Badajoz, Extremadura, Spain); Badajoz (a province of Extremadura, Spain, around the city)

Perhaps from Mozarabic, perhaps from Latin Pācem Augustam. /st/ > /t͡s/ is characteristic of Mozarabic. Compare Arabic بَطَلْيَوْس (baṭalyaws).