Simon Blom b 1917 was the surviving child of Benjamin Blom and Sippora Kreveld. According to Geni he died in 2006 aged 89.
Simon Blom married twice. His first wife Sonja Ray van Amerongen and baby daughter Carla Sipper Blom were Holocaust victims in 1944.
Simon Blom's second wife was Dora Cornelia Bout (1914-1998)
https://www.geni.com/people/Simon-Blom/6000000027821990660