4 Generation Circle Diagram: |
| Tjitske (Family name unknown) Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Jacobus "Jacob" Posthuma < Gerardus "Gerrit" Posthuma |
| Jacobus "Jacob" Posthuma Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Tjitske (Family name unknown) < Gerardus "Gerrit" Posthuma |
| Gerardus "Gerrit" Posthuma Pedigree Tree Pedigree Map Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Interactive Tree Antje Reiding < Arp Posthuma |