4 Generation Circle Diagram: |
| Maria van Baelen Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Pieter Krol < Johanna Wilhelmina Krol < Martinus Krol |
| Pieter Krol Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Maria van Baelen < Johanna Wilhelmina Krol < Martinus Krol |