_William Robinson CLARK _____+
                                                                                                 | (1829 - 1912) m 1855        
                                                                _William Lyon CLARK _____________|_Elizabeth Jane HIGGINS _____
                                                               | (1858 - 1934) m 1884              (1835 - ....)               
                            _Hugh Mordaunt Lyon CLARK _________|
                           | (1889 - 1941) m 1914              |
                           |                                   |                                  _Douglas Cowslade HENNESSEY _
                           |                                   |                                 | (1841 - 1914)               
                           |                                   |_Ada Constance Sophia HENNESSEY _|_Francis Lugard YOUNG _______
                           |                                     (1864 - 1909) m 1884                                          
 _Hugh William LYON-CLARK _|
| (1917 - 1987) m 1945     |
|                          |                                                                      _____________________________
|                          |                                                                     |                             
|                          |                                    _________________________________|_____________________________
|                          |                                   |                                                               
|                          |_Maria Casilda Mangiamelli MAFFEI _|
|                            (.... - 1965) m 1914              |
|                                                              |                                  _____________________________
|                                                              |                                 |                             
|                                                              |_Filomena MANGIAMELLI ___________|_____________________________
|                                                                                                                              
|
|--Gerardo Hugo LYON-CLARK 
|  (1950 - ....)
|                                                                                                 _____________________________
|                                                                                                |                             
|                                                               _________________________________|_____________________________
|                                                              |                                                               
|                           _William FARRELL __________________|
|                          |                                   |
|                          |                                   |                                  _____________________________
|                          |                                   |                                 |                             
|                          |                                   |_________________________________|_____________________________
|                          |                                                                                                   
|_Doris FARRELL ___________|
  (1925 - 2007) m 1945     |
                           |                                                                      _____________________________
                           |                                                                     |                             
                           |                                    _________________________________|_____________________________
                           |                                   |                                                               
                           |_Julia CRANE ______________________|
                                                               |
                                                               |                                  _____________________________
                                                               |                                 |                             
                                                               |_________________________________|_____________________________
                                                                                                                               
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