_______________________
                                            |                       
                       _FNU TERTER _________|
                      |                     |
                      |                     |_______________________
                      |                                             
 _George I TERTER ____|
| (.... - 1308)       |
|                     |                      _______________________
|                     |                     |                       
|                     |_____________________|
|                                           |
|                                           |_______________________
|                                                                   
|
|--Theodore Svetoslav TERTER 
|  (1270 - 1322)
|                                            _______________________
|                                           |                       
|                      _Mitso ASEN _________|
|                     | (.... - 1278)       |
|                     |                     |_______________________
|                     |                                             
|_Kira Maria of ASEN _|
                      |
                      |                      _Ivan II ASEN _________+
                      |                     | (1190 - 1241)         
                      |_Maria of ASEN ______|
                                            |
                                            |_Irene KOMNENOSDOUKAS _+