_Piero de' MEDICI ___+
                                                      | (1471 - 1503)       
                          _Lorenzo de' MEDICI ________|
                         | (1492 - 1519)              |
                         |                            |_Alfonsina ORSINI ___+
                         |                              (1472 - 1519)       
 _Alessandro de' MEDICI _|
| (1510 - 1536)          |
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|                        |_Simonetta of COLLEVECCHIO _|
|                                                     |
|                                                     |_____________________
|                                                                           
|
|--Giulio de' MEDICI 
|  (1533 - 1600)
|                                                      _____________________
|                                                     |                     
|                         ____________________________|
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|                        |                                                  
|_Taddea MALASPINA ______|
  (1505 - ....)          |
                         |                             _____________________
                         |                            |                     
                         |____________________________|
                                                      |
                                                      |_____________________