4 Generation Circle Diagram: |
| Elsien Harms Roghaar
Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Andries Jans Blaak < Jan Andries Blaak < Jan Andries Blaak |
| Albertina Harmanna Huitzing
Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Andries Blaak < Abram Blaak < Willempje Blaak < Jacob Blaak < Jan Andries Blaak |
| Willempje Blaak
Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Meinderd van de Pol Sibling Abram Blaak Jacob Blaak Jan Andries Blaak |