1856-1922
| Christiaan Ferdinand Roelof Portman | |
| G: | 1856 |
| Groningen | |
| O: | 1922 |
| Groningen | |
1858-1864
| Jan Potman | |
| G: | 1858 |
| Groningen | |
| O: | 1864 |
| Groningen | |
1861-
| Francina Potman | |
| G: | 1861 |
| Groningen | |
1864-1945
| Hendrik Frederik Portman | |
| G: | 1864 |
| Groningen | |
| O: | 1945 |
| Enschede | |
-vóór 1945
| Maria Theodora Kames | |
| O: | vóór 1945 |
1866-1871
| Trientje Portman | |
| G: | 1866 |
| Groningen | |
| O: | 1871 |
| Groningen | |
1831-1871
| Franciscus Portman | |
| G: | 1831 |
| Groningen | |
| O: | 1871 |
| Groningen | |
1829-1924
| Johanna Rohde | |
| G: | 1829 |
| Groningen | |
| H: | 1857 |
| Groningen | |
| O: | 1924 |
| Groningen | |