4 Generation Circle Diagram: |
| Johanna van Koolwijk Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Willem van de Pol < Maria van de Pol |
| Willem van de Pol Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Johanna van Koolwijk < Maria van de Pol |
| Maria van de Pol Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Johannes van der Heijden < Hendrikus van der Heijden |