Kurjistan was most likely borrowed from the Turkish exonym Gorjestân, which is of Persian origin, it most likely gained popularity during Ottoman rule.
The Latinized version Buxemae and Bussemae, from the Norman period, however, is the one closest to today's form.
The name eventually became Qal'at Ghīrān (قلعة غيران), 'Fortress of Ghīran' [61] The structure was conceived as a summer residence for the Norman kings, as a part of the large hunting resort known as Genoardo (Arabic: Jannat al-arḍ [جنة الأرض], literally "Earthly Paradise")[106] It was known among the Arabs in old times as Alahāyah.
[112] al-Balāṭ 'The Tiles' or 'The Stones', in reference to the Roman road nearby al-Ballā'a 'The Gutter'.
The place name Casp was documented in Andalusi sources as "Qsp", "Qasp" or "Qasb", and has been related to the Arabic word "Casba"[207] [This could be referring to Qaṣba (قصبة), which translates to 'Rod'] The Battle of Las Navas de Tolosa took place here, and is known in Arabic as The Battle of al-'Uqab, named after Ḥiṣn al-'Uqab.
The name Madinat as-Siyāsah may also be of Arabic origin, and would then translate to 'The City of Politics'.
In modern Arabic, the place is sometimes re-transcribed as al-Ṭaraf al-'Aghar (الطرف الأغر).