| Sacharias (Zacharias) Alberts ( - 1811) |
|
| Greetje Janssen (1738 - 1813) |
| Focke (Fokke) Sacharias Mammenga7 | Frauke Catharina Janssen7 |
| b. Sep 20, 1770, Wirdum, Ost. Germany d. Jul 15, 1846, Wirdum, Ost. Germany bur. occ. bp. |
b. abt 1770 d. Nov 5, 1839, Wirdum, Ost. Germany bur. occ. bp. |
| Ulderk Mammenga Edzard Mammenga Jan Fokken (Heinderks) Mammenga |