According to historian Hans-Jürgen Döscher, Germany's foremost authority on Kristallnacht, vom Rath was homosexual and had met Grynszpan in Le Boeuf sur le Toit, a popular haunt for gay men in 1938. The French writer André Gide, himself a homosexual, testified in his personal diaries that vom Rath was well known in the Parisian homosexual community. There were rumours that occasionally he was called "Madame Ambassador" and "Notre Dame de Paris." His brother, Gustav, was convicted of homosexual offences and there were allegations that vom Rath was treated for rectal gonorrhoea at the Berlin Institute of Radiology.