Children:
- Tamme Sierds Seijnstra was born on 04 May 1772 in Kortezwaag, Opsterland, FR, NLD.
- 1. Korneliske Sierds Zijnstra was born in 1771 in Kortezwaag, Opsterland, FR, NLD; died on 18 Nov 1856 in Oldeboorn, FR, NLD.
- Tamme Sierds was born on 13 Aug 1776 in in het Oosterend, Kortezwaag, Opsterland, FR, NLD.
- Ekke Sierds was born on 26 Apr 1778 in in het Oosterend, Kortezwaag, Opsterland, FR, NLD.
- Renskjen Sierds was born on 31 Jan 1782 in Kortezwaag, Opsterland, FR, NLD.
- Kornelis Sierds Zijnstra was born on 04 Mar 1784 in Kortezwaag, Opsterland, FR, NLD; died on 17 Mar 1855 in Drachten, Smallingerland, FR, NLD.
- Freerk Sierds was born on 18 Mar 1786 in Kortezwaag, Opsterland, FR, NLD.
- Eeuwkjen Sierds was born on 21 Dec 1789 in in het Oosterend, Kortezwaag, Opsterland, FR, NLD.
- Lolkje Sierds Zijnstra was born on 21 Dec 1789 in Kortezwaag, Opsterland, FR, NLD; died on 21 Apr 1868 in Opsterland, FR, NLD.
- Freerk Sierds Seinstra was born about 1785; died on 21 Jul 1833 in in het water te Compagnie, Jubbega Schurega, Schoterland, FR, NLD.
- Sijtske Sierds was born on 22 Jun 1792 in in het Oosterend, Kortezwaag, Opsterland, FR, NLD.
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