Children:
- Neeltje Fetzes Koopmans was born about 1810; died on 16 Nov 1814 in Akkrum, Utingeradeel, FR, NLD.
- Willem Fetzes Koopmans was born about 1812 in Akkrum, Utingeradeel, FR, NLD.
- Antje Fetzes Koopmans was born on 12 May 1814 in Akkrum, Utingeradeel, FR, NLD.
- Tiete Fetzes Koopmans was born on 04 Apr 1816 in Akkrum, Utingeradeel, FR, NLD; died on 14 May 1902 in Irnsum, Rauwerderhem, FR, NLD.
- 1. Arjen Fetzes Koopmans was born on 23 Feb 1818 in Akkrum, Utingeradeel, FR, NLD.
- Jouke Fetzes Koopmans was born on 31 Dec 1819 in Utingeradeel, FR, NLD.
- Neeltje Fetzes Koopmans was born on 13 Feb 1822 in Utingeradeel, FR, NLD.
- Martzen Fetzes Koopmans was born on 13 Feb 1822 in Akkrum, Utingeradeel, FR, NLD; died on 02 Dec 1890 in Utingeradeel, FR, NLD.
- Joukjen Fetzes Koopmans was born on 18 Sep 1824 in Utingeradeel, FR, NLD.
- Janke Fetzes Koopmans was born on 08 Feb 1827 in Akkrum, Utingeradeel, FR, NLD.
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