Children |
| 1. Geertje Piers Tiersma, b. 03 Mar 1829, Doniawerstal, FR, NLD d. 12 Mar 1829, Doniawerstal, FR, NLD (Age 0 years) |
| 2. Wiepkjen Piers Tiersma, b. 03 Mar 1829, Doniawerstal, FR, NLD |
| 3. Geertje Piers Tiersma, b. 28 Jun 1830, Doniawerstal, FR, NLD d. 09 Nov 1836, Doniawerstal, FR, NLD (Age 6 years) |
| 4. Harmen Piers Tiersma, b. 10 Oct 1835, Goingarijp, Doniawerstal, FR, NLD |
| 5. Geertje Piers Tiersma, b. 21 May 1838, Doniawerstal, FR, NLD d. 26 Apr 1902, Utingeradeel, FR, NLD (Age 63 years) |
| 6. Pieter Piers Tiersma, b. 19 Jun 1833, Goingarijp, Doniawerstal, FR, NLD |
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