 La Guardia's sister, Gemma La Guardia Gluck (1881–1962), and brother-in-law, Herman Gluck (a Hungarian Jew whom she met while teaching English in Europe), were living in Hungary and were arrested by the Gestapo on June 7, 1944, when the Nazis took control of Budapest.Adolf Eichmann and Heinrich Himmler knew that Gemma was La Guardia's sister and ordered her to be held as a political prisoner.She and Herman Gluck were deported to Mauthausen concentration camp in Austria, where he died, as Gemma learned from reading a newspaper account a year after her own release.