| Cornelis Koskamp (ca1700 - ) |
Frerik Nellis Ruesink (1680 - ca1743) |
| Griete (=Grietjen) ten Broeke (1697 - >1748) |
| Gerrit Koskamp | Aaltjen Ruesink |
| b. 27 Sep 1716, Aalten, Netherlands d. bur. occ. edu. rel. |
b. 10 Jan 1734, De Heurne (Dinxperlo) Netherlands d. bur. occ. edu. rel. |
| Fijken Koskamp Derk Koskamp Manes Koskamp Elsken Koskamp |