Their elder son, John Amery (1912–1945), became a Nazi sympathizer. During the Second World War he made propaganda broadcasts from Germany, and induced a few British prisoners of war to join the German-controlled British Free Corps. After the war, he was tried for treason, pleaded guilty, and was hanged. His father amended his entry in "Who's Who" to read "one swith the editors' permission. The playwright Ronald Harwood, who explored the relationship between Leo and John Amery in his play "An English Tragedy" (2008), considered it significant to the son's story that the father had apparently concealed his partly-Jewish ancestry.