What is "theodosiopolis"

Theodosiopolis (, "city (-polis) of Theodosius") can refer to several Ancient cities, including former (arch)bishorpics :

• Theodosiopolis ante Apri, now in Bulgaria, a former archdiocese and present Latin Catholic titular archbishopric
• Aprus, in Roman province Europe, at the site of modern Kestrice, a former diocese and present Latin Catholic titular bishopric (suppressed as Theodosiopolis, but restored as Aprus - cfr. above?)
• Theodosiopolis in Arcadia, in Roman province Arcadia Aegypti, also a former archdiocese, now a Latin Catholic titular archbishopric
• Theodosiopolis (Turkey), the modern Erzurum (Asian Turkey), formerly a diocese in Roman Armenia Tertia, now a Latin Catholic titular bishopric
• Theodosiopolis (Osroene), also known as Resaina, the modern Ra's al-'Ayn in Syria