4 Generation Circle Diagram: |
| Theodora Nicolaassen Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Johannes "Jan" van Erp < Antonia van Erp |
| Willibrordus Donkers Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Antonia van Erp < Johanna Donkers < Willibrordus Donkers < Gerardus Donkers |
| Gerardus Donkers Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Maria Sommers < Johannes van Erp Siblings Johanna Donkers Willibrordus Donkers |