| Jacob Klasen Werkman (1777 - 1860) |
Jan Reinders Werkman (1774 - 1833) |
| Trijntje Harms |
Aafke Hendriks (1781 - ) |
| Harm Jacobs Werkman | Geertruida Jans Werkman |
| b. 23 Feb 1800, Warffum d. bur. occ. edu. rel. |
b. 19 Feb 1801, Kantens d. bur. occ. edu. rel. |
| Spouses: 1, 2, 3, 4, 5 |
| Jan Werkman Trientje Werkman |