Heydarabad is the capital of the Sadarak rayon of the Nakhchivan Autonomous Republic of Azerbaijan. Sadarak may refer to Sadarak Rayon, Azerbaijan Sədərək, Azerbaijan capital of the above The Nakhchivan Autonomous Republic (Naxçıvan Muxtar Respublikası Նախիջևանի Ինքնավար Հանրապետություն Нахичеванская Автономная Azerbaijan ( English; Azərbaycan officially the Republic of Azerbaijan (Azərbaycan Respublikası is the largest and most populous country in the South It is named after former Azerbaijani President Heydar Aliyev. Heydar Alirza oglu Aliyev (Heydər Əlirza oğlu Əliyev Гейдар Алиев May 10, 1923 &ndash December 12, 2003) also spelled as