| 1. | Martha Margarethe Lehman was born on 8 Feb 1863; died on 16 Oct 1904. Martha married Baron Daniël Adrian Hector Willem Sixma van Heemstra on 20 Oct 1893. Daniël (son of Baron Coenraad Jacob Sixma van Heemstra and Johanna Sophie Christiane Tappen) was born on 30 Dec 1864; died on 18 Jan 1955. [Group Sheet] [Family Chart]
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| 2. | Barones Margarethe Sixma van Heemstra |
| 3. | Baron Daniël Adrian August Wilhelm Sixma van Heemstra |
| 4. | Barones Martha Maria Mathilda Ada Sixma van Heemstra |
| 5. | Baron Hans Wilhelm Hermann Wasserfall Sixma van Heemstra |