Sister: Meta Fleischhacker née Holzer
Meta Fleischhacker (Holzer) (1896 - c.1942) - Genealogy (geni.com)
Brother-in-law Oscar Fleischhacker
Oscar Oskar Fleischhacker (1890 - c.1942) - Genealogy (geni.com)
See:
[CLI Part 33] 132778361 - Dokumente / CLI Part 33 - Talk in the Forum of the Arolsen Archives