_Leo III ISAURIA ____
                                                   | (0685 - 0741)       
                           _Constantine V ISAURIA _|
                          | (0718 - 0775)          |
                          |                        |_Maria of UNKNOWN ___
                          |                          (.... - 0718)       
 _Leo IV ISAURIA _________|
| (0749 - 0780)           |
|                         |                         _Bihar of KHAZAR ____
|                         |                        |                     
|                         |_Tzitzak of KHAZAR _____|
|                           (.... - 0750)          |
|                                                  |_____________________
|                                                                        
|
|--Constantine VI ISAURIA 
|  (0770 - 0805)
|                                                   _____________________
|                                                  |                     
|                          ________________________|
|                         |                        |
|                         |                        |_____________________
|                         |                                              
|_Irene of SARANTAPECHOS _|
  (0750 - 0803)           |
                          |                         _____________________
                          |                        |                     
                          |________________________|
                                                   |
                                                   |_____________________