4 Generation Circle Diagram: |
| Helena Snoeren Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Leonardus de Groot < Willem de Groot |
| Leonardus de Groot Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Helena Snoeren < Willem de Groot |
| Joanna Damen Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Joannes Riool < Catharina Riool < Johanna Willemina Riool Sibling Wilhelmus Damen |
| Petrus Fens Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Johanna van Strien < Adrianus Wilhelmus Fens < Petrus "Pieter" Fens < Willem Fens |