| Siech, Albertine | Jesse | Siech Herbert Georg Edgar | 1962 |
| Siech, Bauline Justine | Selgert | Siech Robert Paul Oskar | 1959 |
| Siech, Georg Herbert Edgar | 1969 | ||
| Siech, Herbert Georg Edgar | 1962 | ||
| Siech, Johann Rudolf | 1905 | ||
| Siech, Karl | 1974 | ||
| Siech, Robert Paul Oskar | 1969 |