_Phraates III ARSACID ______+
                                             |                            
                        _Orodes II ARSACID __|
                       |                     |
                       |                     |____________________________
                       |                                                  
 _Phraates IV ARSACID _|
|                      |
|                      |                      _Antiochus I Theos ORONTID _+
|                      |                     |                            
|                      |_Laodice of ORONTID _|
|                                            |
|                                            |____________________________
|                                                                         
|
|--Vonones I ARSACID 
|  (.... - 0019)
|                                             ____________________________
|                                            |                            
|                       _____________________|
|                      |                     |
|                      |                     |____________________________
|                      |                                                  
|______________________|
                       |
                       |                      ____________________________
                       |                     |                            
                       |_____________________|
                                             |
                                             |____________________________