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 |
| Pietertje Drenth
Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Andries Jans Blaak < Jan Andries Blaak < Ike Blaak < Ike Blaak < Abram Jan Blaak |
| Jan Andries Blaak
Pedigree Tree Descendancy Chart Ancestry Chart Compact Chart Circle Diagram Hourglass Chart Froukje Huizing < Abram Jan Blaak Sibling Ike Blaak Ike Blaak Abram Jan Blaak |