Friedrich-Franz von Westarp
Martha Bruchhmann 
Her married name became von Westarp.
Angela-Luise von Westarp 
Her married name became von Landmann.
Felix von Landmann 
Hilda von Westarp 
Her married name became Hahn.
Anton Hahn 
Viktor von Westarp 
Children of Viktor von Westarp and Klara Hosang
- Brunhilde von Westarp b. 1896
- Margarethe von Westarp b. 1900
Children of Viktor von Westarp and Frieda Breithaupt
- Friedrich Hagenn von Westarp b. 1923, d. 1954
- Karl Joachim von Westarp+ b. 1926
Klara Hosang 
Her married name became von Westarp.
Children of Klara Hosang and Viktor von Westarp
- Brunhilde von Westarp b. 1896
- Margarethe von Westarp b. 1900
Frieda Breithaupt
Her married name became von Westarp.
Children of Frieda Breithaupt and Viktor von Westarp
- Friedrich Hagenn von Westarp b. 1923, d. 1954
- Karl Joachim von Westarp+ b. 1926
Friedrich Hagenn von Westarp 
