Jonas van Loggem married Saartje Walg on 20 August 1902. The couple had nine children: Rebecca, Jacob, Levie, Joseph, Rozette and the here mentioned Samuel, Max en Hartog.
Only one son has survived the Holocaust, toghether with his family.
City Archive of Amsterdam, family registration card of Jonas van Loggem, archive card of Emanuel van Loggem and an addition of a visitor of the website.