https://www.mappingthelives.org/bio/9873861e-e0a9-45a2-aaf2-3fc12c2c0e85
her Brother Rolf
Irene Calmanowitz (deceased) - Genealogy (geni.com)
https://www.dutchjewry.org/genealogy/deventer/591.shtml
Brother: Rolf Calmanowitz
Palestina pioniers (joodsebegraafplaatsassen.nl)