Children:
- 1. Leffert Tjeerds van Althuis was born on 25 Dec 1774 in De Fok, Aengwirden, FR, NLD.
- Janke Tjeerds van Althuis was born on 11 May 1776 in Wirdum, Leeuwarderadeel, FR, NLD.
- Sjouke Tjeerds van Althuis was born on 19 Aug 1783 in Wirdum, Leeuwarderadeel, FR, NLD; died on 31 May 1862 in huis 20, Slappeterp, Menaldumadeel, FR, NLD.
- Jacobus Tjeerds van Althuis was born on 03 Dec 1786 in Wirdum, Leeuwarderadeel, FR, NLD.
- Pieter Tjeerds van Althuis was born on 22 Jun 1791 in Wirdum, Leeuwarderadeel, FR, NLD.
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