Johann Trefz
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- 1 Johann Trefz [1]
- Christina Job b. 26 Dec 1881 d. 4 Mar 1950
- 2 Gustav Trefz [1.1]
- 2 Lydia Trefz [1.2]
- 2 Christina Trefz [1.3]
- 2 Rosina Trefz [1.4]
- 2 Gustav Trefz [1.1]