Petronella (1871-1937) married in 1898 with Maarten Henricus van Hillegondsberg (1871-±1904). Their children:

- Adriana Margaretha Barbara van Hillegondsberg (1900-..) married with Antoon Emiel Maria Jozef Theophiel De Ridder (1892-..) from Mechelen (Belgium).
- Anna Maria Petronella van Hillegondsberg (1903-..) married in 1923 with Klaas Stastra (1901-..) from Zwartsluis.

Petronella Spermon (1871-1937) had after the dead of Maarten Henricus van Hillegondsberg a child Cornelis Spermon (1907-1987).

Cornelis Spermon (1907-1987) married with Cornelia Adriana Morren (1910 - 1999) in 1934. Cornelia moved to Australia. Their children:

- Harry (Henricus) Spermon, born 1935 Hilversum;
- Bob (Robert) Spermon, born 1940 De Bilt;
- Bert (Theophil Albert) Spermon, born 1943 De Bilt;
- Peter (Pierre) Spermon, born 1947 Venlo.

They moved in 1951 to Sydney [Australia] (the family left Holland from Rotterdam by boat "De Groote Beer", arriving in Sydney - Australia on 29th March, 1951).