4 Generation Circle Diagram: |
| Dorotheo de Heeger Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Isaak van Gorkom < David van Gorkom |
| Wilhelmina van Gorkom Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Isaak van Sandwijk < Johanna Gerardina van Sandwijk |
| Isaak van Sandwijk Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Wilhelmina van Gorkom < Johanna Gerardina van Sandwijk |