Major cities of Khazaria included:
Along the Caspian coast and Volga delta -- Atil? Khazaran? Samandar?
In the Caucasus? -- Balanjar? Sambalut? Samiran? Sarir? Maghas? (Alan capital) Sukhumi? (Abkhazian capital)
In the Crimea? and Taman? region -- Kerch? (also called Bospor) Feodosia? Mangup? (also called Doros) Samkarsh? (also called Tmutorokan, Tamatarkha) Sudak? (also called Sugdaia)
In the Don? valley -- Sarkel
In the Dnieper? valley -- Kiev?
Bibliography of Khazar Studies, 1901-Present http://www.khazaria.com/khazar-biblio/toc.html