_Thomas BEEKMAN _____+
                                            | (1689 - 1759)       
                       _Johannes BEEKMAN ___|
                      | (1723 - 1792)       |
                      |                     |_____________________
                      |                                           
 _Tjerck BEEKMAN _____|
| (1754 - 1791)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_Lidia VAN KEUREN ___|
|                       (1729 - 1795)       |
|                                           |_____________________
|                                                                 
|
|--John BEEKMAN 
|  (.... - 1814)
|                                            _____________________
|                                           |                     
|                      _____________________|
|                     |                     |
|                     |                     |_____________________
|                     |                                           
|_Rachel DUMONT ______|
  (1763 - 1856)       |
                      |                      _____________________
                      |                     |                     
                      |_____________________|
                                            |
                                            |_____________________