After Lenel's death, the members of his family met a cruel fate in Nazi Germany: His widow of more than 80 years of age, Luise, née Eberstadt (born 25 February 1857 in Frankfurt) and his daughter Bertha Lenel (born 7 March 1882 in Freiburg) were sent on 22 October 1940 to an internment camp in Gurs, France.
After Lenel's demise, members of his family suffered a tragic fate in Nazi Germany: His widow, Luise, née Eberstadt (born 25 February 1857 in Frankfurt), and his daughter, Bertha Lenel (born 7 March 1882 in Freiburg), were sent to an internment camp in Gurs, France on 22 October 1940.