Edward III                                                
                         King of England 1327-1377                                 
                         1312-1377                                                 
                             |                                                     
                             |                                                     
                         John of Gaunt                                             
                         Duke of Lancaster                                         
                         1340-1399                                                 
                             |                                                     
                             |                                                     
                         John Beaufort                                             
                         Earl of Somerset, Marquess of Dorset and Somerset         
                         1373-1410                                                 
                             |                                                     
                             |                                                     
                         John Beaufort                                             
                         1st Duke of Somerset                                      
                         1404-1444                                                 
                             |                                                     
                             |                                                     
                         Lady Margaret Beaufort                                    
                         1443-1509                                                 
                             |                                                     
                             |                                                     
                         Henry VII                                                 
                         King of England 1485-1509                                 
                         1457-1509                                                 
                             |                                                     
                             |                                                     
                         Henry VIII                                                
                         King of England 1509-1547                                 
                         1491-1547                                                 
                             |                                                     
                             |                                                     
                         Catherine Cary                                            
                         1524-1569                                                 
                             |                                                     
                             |                                                     
                         Lettice Knollys                                           
                         1543-1634                                                 
                             |                                                     
                             |                                                     
                         Lady Dorothy Devereux                                     
                             |                                                     
                             |                                                     
                         Lady Dorothy Percy                                        
                         1598-1659                                                 
                             |                                                     
                             |                                                     
                         Lady Lucy Sydney                                          
                             |                                                     
                             |                                                     
                         Elizabeth Pelham                                          
                             |                                                     
                             |                                                     
                         George Montague                                           
                         1st Earl of Halifax                                       
                         1685-1739                                                 
                             |                                                     
                             |                                                     
                         Lady Lucy Montague                                        
                         1708-1734                                                 
                             |                                                     
                             |                                                     
                         Frederick North                                           
                         2nd Earl of Guilford                                      
                         1732-1792