| 1. Aaffien Birza |
 |
| D: |
13 jun 1797 |
| te: |
Groningen |
| O: |
3 jul 1830 |
| te: |
Groningen |
|
| 2. Wolter Jans Birza |
|
| D: |
7 jul 1752 |
| te: |
Groningen |
| H: |
21 nov 1790 |
| te: |
Wirdum |
| O: |
10 dec 1826 |
| te: |
Loppersum |
|
| 4. Derk Birza |
|
| D: |
27 nov 1711 |
| te: |
Groningen |
| H: |
18 apr 1751 |
| te: |
|
| O: |
28 feb 1786 |
| te: |
Groningen |
|
| 8. |
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1797 - 1830 (~ 33 jaar)