Thomas A. Carlson (eds.), "al-Ray" in The Beth Qaṭraye Gazetteer last modified January 10, 2020, https://bqgazetteer.bethmardutho.org/place/2970
   
      
         
            
               al-Ray
               الري
               al-Rayy
               [T]he ancient Rag̲h̲ā, a city
                  in the old Persian region of Media, during Islamic times in the province of
                  D̲j̲ibāl (...). Its ruins may be seen about 5 miles south-southeast of Tehran
                  (...) to the south of a spur projecting from Elburz into the plain.
               A city in northern Iran.ذكر المتغلّبين على الملك بعد موت السلطان أبي سعيد (...) ومنهم حسن خواجه بن الدّمرطاش بن الجوبان، تغلب على تبريز والسلطانيّة وهمدان، وقمّ وقاشان والريّ ورامين وفرغان والكرج
                    
                        35.584692 51.467636
                                   
               
                  35.594267 51.447163
               
               
                  Attestation of name الري in the
                        Kitāb al-buldān of Aḥmad
                        ibn Abī Yaʿqūb al-Yaʿqūbī.
                  
               
               
                  
                  
               
               https://bqgazetteer.bethmardutho.org/place/2970
               http://syriaca.org/place/2970
               https://pleiades.stoa.org/places/903104
               https://en.wikipedia.org/wiki/Rey,_Iran
               https://dbpedia.org/resource/Rey,_Iran
               
                  https://pleiades.stoa.org/places/903104Pleiades: A Gazetteer of Past PlacesRoger BagnallRichard TalbertTom ElliottLindsay Holmanet al.
                  
               
               
                  Kitāb al-buldān
                  Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                  
                  269
               
               
                  Riḥlat Ibn Baṭṭūta. Tuḥfat al-nuẓẓār fī gharāʾib
                     al-amṣār wa-ʿajāʾib al-asfār
                  Ibn Baṭṭūta
                  
                  240
               
                    
                        Encyclopaedia of Islam, Second Edition
                        P. Bearman
                        
                    
                    
                        http://pleiades.stoa.org/places/903104Pleiades: A Gazetteer of Past Places Roger Bagnall Richard Talbert Tom Elliott Lindsay Holman et al. 
                    Riḥlat Ibn Baṭṭūta. Tuḥfat al-nuẓẓār fī gharāʾib al-amṣār wa-ʿajāʾib al-asfārIbn Baṭṭūta240