4 Generation Circle Diagram: |
| Maria Kroese Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Petrus van Gerven < Waltherus Martinus van Gerven |
| Petrus van Gerven Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Maria Kroese < Waltherus Martinus van Gerven |