4 Generation Circle Diagram: |
| Wilhelmina van Erp Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Jan Willems (Family name unknown) < Wilhelmus "Willem" Janssen |
| Jan Willems (Family name unknown) Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Wilhelmina van Erp < Wilhelmus "Willem" Janssen |
| Wilhelmus "Willem" Janssen Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Maria Verploegen < Theodorus Janssen |