Lodewijk de Leeuw and Johanna Mansfeld married in Arnhem in 1907. They had three children who did not live with them anymore and who survived the war. Addition of a visitor of the website
Herman de Leeuw zat in het schooljaar 1942-1943 in klas 2A van het Joods Lyceum in Amsterdam. Bron: Dienke Hondius, Absent: Herinneringen aan het Joods Lyceum Amsterdam 1941-1943 (Amsterdam 2001) 269.