_Attalus ATTALID ____+
                                                    |                     
                            _Attalus ATTALID _______|
                           |                        |
                           |                        |_____________________
                           |                                              
 _Attalus I Soter ATTALID _|
|                          |
|                          |                         _Achaeus SELEUCID ___+
|                          |                        |                     
|                          |_Antiochis of SELEUCID _|
|                                                   |
|                                                   |_____________________
|                                                                         
|
|--Attalus II ATTALID 
|  
|                                                    _____________________
|                                                   |                     
|                           ________________________|
|                          |                        |
|                          |                        |_____________________
|                          |                                              
|_Apollonis of CYZICUS ____|
                           |
                           |                         _____________________
                           |                        |                     
                           |________________________|
                                                    |
                                                    |_____________________