_Gerardus Willemse BEEKMAN _+
                                            | (1653 - 1723) m 1677       
                       _William BEEKMAN ____|
                      | (1684 - 1770)       |
                      |                     |_Magdalena ABEEL ___________+
                      |                       (1660 - 1745) m 1677       
 _James BEEKMAN ______|
| (1732 - 1807)       |
|                     |                      ____________________________
|                     |                     |                            
|                     |_Catharine of LANOY _|
|                       (1691 - 1765)       |
|                                           |____________________________
|                                                                        
|
|--William BEEKMAN 
|  (1754 - ....)
|                                            ____________________________
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|                      _____________________|
|                     |                     |
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|                     |                                                  
|_Janneke KETELTAS ___|
  (1734 - 1817)       |
                      |                      ____________________________
                      |                     |                            
                      |_____________________|
                                            |
                                            |____________________________