The Genealogy Page of Jorge Heredia and Heleen Sittig

Ronald Kolthoff

____ - ____

Father: Siegfried Kolthoff
Mother: Eva Lily Steeris

Family 1 : Joan Barbara Floyd 
                                                     _Simon Kolthoff _____+
                                                    | (1837 - 1900) m 1863
                       _Eliazer Kolthoff ___________|
                      | (1872 - 1939) m 1900        |
                      |                             |_Rebekka van Essen __+
                      |                               (1841 - 1912) m 1863
 _Siegfried Kolthoff _|
| (1902 - 1968)       |
|                     |                              _Marcus van Oss _____+
|                     |                             | (1833 - 1910) m 1867
|                     |_Francisca Jacobina van Oss _|
|                       (1872 - 1943) m 1900        |
|                                                   |_Roosje Meijer ______+
|                                                     (1841 - 1928) m 1867
|
|--Ronald Kolthoff 
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|_Eva Lily Steeris ___|
  (1913 - ....)       |
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