| | Titia Saskelina Biewenga – | | | | Jan Willem Biewenga 1916–1965 Klaaske Meindertsma 1915–1951 | | | | | Eelke Sijbes Meindertsma 1883–1973 Sijtske Couperus 1884–1955 | | | | Sybe Meinderts Meindertsma 1851–1894 Baukje Eelkes Holwerda 1855–1943 | | |
| | | Goitzen Gaeles Couperus – Siebrigje Tjeerds Kloosterman – |
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