Jan Spermon (1893-1960) married in 1917 with Betty Cornelia Vellekoop (1897-1974) and had four children:

- Maria (1916-died (no date));
- Jan (1921-1993);
- Catharina (Tinie) Maria (1924-2001);
- Johannes (Joop) Casper (1926-2009).

Jan Spermon (1921-1993) married in Den Haag (1947) with Cornelia (Corry) Hulst (1924-1992) and had a son also Jan Jacobus Spermon (1948).

Jan Spermon (1948) married in Poeldijk (1975) with Elisabeth (Els) Christina Maria van Ruyven (1954-1998), their children are:

- Mark Stafan Wilhelmus Spermon (1982);
- Michelle Ester Spermon (1985).

Jan Spermon (1948) married again in 2003 after the dead of Els van Ruyven with Jacqueline van Leeuwe (1964).


Johannes (Joop) Casper (1926-2009) married in Den Haag (1945) with Elisabeth Catharina van de Kaay (1926-1995), their children are:

- Elisabeth Catharina (1945);
- Johanna Catharina (1950).