Isaac (1876–1942), Jacob (1877–1942), Anna (1883–1942), and Leentje Bondt (1898–1942) were four unmarried siblings who continued to live together after the death of their parents.
Their father, Joseph Bondt, had been a barber. He died in 1907. The eldest son, Abraham (born 1874), had been living in London since 1899. According to the military register, he was a musician. His younger brother Andries (Andrew) followed him there in 1902. Andrew married his cousin Anna Bondt in 1915; their daughter Bertha died in 1935.
Their mother, Rachel Bondt-van Praag, died in 1938 at the age of 86. From London, Abraham, as the eldest son, placed the death notice in the Netherlands.
Father Joseph and mother Rachel are buried in Muiderberg.
Leentje, the youngest of the Bondt children, worked close to home: she was a cleaner at the Dutch Israelite Main Synagogue, now part of the museum. Her brother Isaac was a diamond cutter. Anna worked as a shop assistant. Jacob was a porter.
The Bondt siblings were arrested on 10 September 1942—just like their neighbors Sara Vos and Betje Bloch—and, after one night in Westerbork, were deported on the 18th transport to Auschwitz. There they were murdered on 14 September.
Abraham died in London in 1950. Andries/Andrew died in 1966. They left no descendants.