| August Johan Koenen b.1862 Soerabaija, IDN d.1907 's-Gravenhage, ZH, NLD |  | Matthijs Koenen b. d.
| Louis Matthijs Koenen b.1863 Soerabaija, IDN d. Telok Semawé (Atje, IDN |
| Helena Sophia Caroline Koenen b.1864 Soerabaija, IDN d.1933 's-Gravenhage, ZH, NLD |  |  |  |  | Petrus Lautenslager b.1795 Utrecht, UT, NLD d.1829 's-Gravenhage, ZH, NLD |
| Anna Koenen b.1865 Soerabaija, IDN d.1933 's-Gravenhage, ZH, NLD |  |  | Hendricus (Joannes Lautenslager b.1813 Utrecht, UT, NLD d.1862 Malang, IDN |  | Anna Catharina Wentz (Wensch) b. d.1835 Utrecht, UT, NLD |
| Henriëtte Koenen b.1867 Soerabaija, IDN d.1948 's-Gravenhage, ZH, NLD |  | Johanna Lautenslager b.1843 Joure, FR, NLD d.1928 's-Gravenhage, ZH, NLD |  |  | Harm Roelfs Roelofsma b. d.
| Willem Koenen b.1869 Soerabaija, IDN d. |  |  | Roelofina (Roelfje Roelofsma b.1818 Sappemeer, GR, NLD d. |  | Barbara Pieters b. d.
| Maria Helena Koenen b.1870 Soerabaija, IDN d. |  |