 | Lourens Claesen Koster (1723-1791) 
|
 | Lysbeth Lourens Koster (1747- ) |
| Fokeltje Lourens Koster (1749- ) |
| Klaas Lourens Koster (1750- ) |
| Tryntje Lourens Koster (1752- )  |
| Maartie Lourens Koster (1756- ) |
| Sybe Lourens Koster (1757-1759) |
| Sybe Lourens Koster (1760-1762) |
| Sybe Lourens Koster (1763-1805) |
| Jacob Lourens Koster (1765- ) |
| Teunis Lourens Koster (1754- )
|
| Lourens Koster (1781- ) |
| Pietje Koster (1782- ) |
| Eelkje Koster (1783- ) |
| Jan Koster (1785- ) |
| Jantjen Koster (1788- ) |
| Rinske Koster (1792- ) |
