_Ariobarzanes MITHRIDATE _____+
                                                           |                              
                               _Mithridates II MITHRIDATE _|
                              |                            |
                              |                            |______________________________
                              |                                                           
 _Mithridates III MITHRIDATE _|
|                             |
|                             |                             _Antiochus II Theos SELEUCID _+
|                             |                            |                              
|                             |_Laodice of SELEUCID _______|
|                                                          |
|                                                          |_Laodice I of SELEUCID _______+
|                                                                                         
|
|--Pharnaces I MITHRIDATE 
|  
|                                                           ______________________________
|                                                          |                              
|                              ____________________________|
|                             |                            |
|                             |                            |______________________________
|                             |                                                           
|_Laodice of SELEUCID ________|
                              |
                              |                             ______________________________
                              |                            |                              
                              |____________________________|
                                                           |
                                                           |______________________________