Wilhelm Louis SIPPEL 1891–1962 | | |
Erich Albert Wilhelm Karl SIPPEL 1896–1916 | | |
Herbert Walter Alfred PROPF – | | |
Gerhard Siegfried PROPF – | | |
| | Irmgard Marianne SIPPEL – Georg Oskar Heino PROPF – | | |
| | Marie Louise Ilse SIPPEL – | | |
Anna Minna Berta Elfriede SIPPEL – | | |
| | Johann Wilhelm Hermann SIPPEL 1900–1961 | | |
Wilhelm Gustav Peter SIPPEL – | | |
| | Bertha HILDEBRANDT 1865–1931 | | |