Gezin: Johannes Harckes Folkertsma / Fockien Wiegers Schreuder (F9961)
getr. 1754 | Harke Johannes Folkertsma (1683-1740) 
|
 | Grietje Vogelsang (1687- ) |
| Johannes Harckes Folkertsma (1722-1812)
|
| Fockien Wiegers Schreuder (1728-1808) |
| Cornelis Johannes Folkertsma (1759-1829)  |
| Harke Johannes Folkertsma (1755- ) |
| Grietje Johannes Folkertsma (1763-1831) |
| Wigerus Johannes Folkertsma (1756-1837) |
| Anna Johannes Folkertsma (1767-1855) |
| Homme Johannes Folkertsma (1761-1761) |
| Geeltje Johannes Folkertsma (1771- ) |