4 Generation Circle Diagram: |
| Petronella Catharina Sara de Balbian Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Dirk Johannes Blok < Henri Peter Blok |
| Dirk Johannes Blok Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Petronella Catharina Sara de Balbian < Henri Peter Blok |
| Henri Peter Blok Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Johanna Francina Benjamina van der Schalk < Dirk Peter "Dick" Blok |