Children |
| 1. Alida Maria Koper, b. 10 Feb 1889, Wormerveer, NH, NLD d. 13 Jun 1972, Heeswijk, UT, NLD (Age 83 years) |
| 2. Joannes Joseph Koper, b. 15 Nov 1890, Wormerveer, NH, NLD d. 03 Jan 1951, Nijmegen, GL, NLD (Age 60 years) |
| 3. Petrus Thomas Koper, b. 07 Mar 1893, Wormerveer, NH, NLD d. 11 Apr 1972, Vinkeveen, UT, NLD (Age 79 years) |
| 4. Joseph Johannes Koper, b. 19 May 1895, Wormerveer, NH, NLD d. 10 Feb 1974, Amsterdam, NH, NLD (Age 78 years) |
| 5. Antonius Joannes Koper, b. 25 Aug 1897, Wormerveer, NH, NLD d. 09 Sep 1972, Amsterdam, NH, NLD (Age 75 years) |
| 6. Afra Catharina Koper, b. 29 Sep 1899, Wormerveer, NH, NLD d. 03 May 1958, Groesbeek, GL, NLD (Age 58 years) |
| 7. Simon Johannes Koper, b. 28 Jun 1902, Wormerveer, NH, NLD d. 29 Mar 1974, Helmond, NB, NLD (Age 71 years) |
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