Children:
- Anne Piers Koopmans was born about 1789 in Hommerts, Wijmbritseradeel, FR, NLD; died on 02 Feb 1849 in Sneek, FR, NLD.
- Geertje Piers Koopmans was born about 1792 in Hommerts, Wijmbritseradeel, FR, NLD; died on 28 Jan 1821 in Jutrijp, Wijmbritseradeel, FR, NLD.
- Hotske Piers Koopmans was born about 1797.
- 1. Corneliske Piers Koopmans was born about 1800 in Hommerts, Wijmbritseradeel, FR, NLD.
- Johantje Piers Koopmans was born about 1802.
- Pieter Piers Koopmans was born about 1805 in Hommerts, Wijmbritseradeel, FR, NLD.
- Klaas Piers Koopmans was born about 1808.
- Pier Piers Koopmans was born in 1811 in Hommerts, Wijmbritseradeel, FR, NLD.
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