Gerardhus Posthuma
| Sex: | Male | |
| Father: | Jan Frederik Posthuma | |
| Mother: | Freerkje Jans van der Schaaff | |
| Birth: | 5 Mar 1833 | Dokkum, FR, NL |
| Death: | (?) | |
| Sex: | Male | |
| Father: | Jan Frederik Posthuma | |
| Mother: | Freerkje Jans van der Schaaff | |
| Birth: | 5 Mar 1833 | Dokkum, FR, NL |
| Death: | (?) | |