In 1898, he married Edith, daughter of Max Low of London, by whom he had two sons, Stephen and Richard. The couple divorced in 1909 and in 1910 he married Muriel Carmel, the daughter of
Albert Goldsmid. They had two sons,
David, who was killed in the
Spanish Civil War, and
Peter; and a daughter, Angela. His third marriage was in 1944 to Edith Edgar MacQueen, daughter of George MacQueen, who was the first woman to be granted a Ph.D. by the
University of St Andrews. He was the grandfather of actor, writer, director, and musician
Christopher Guest, who is now the 5th Baron, as well as the writer
Anthony Haden-Guest. Haden-Guest
converted to Judaism before his marriage to Muriel Goldsmid, his second wife. He renounced Judaism in 1924. He was the first Jew to stand for Parliament as a Labour candidate.
Bertrand Russell described Haden-Guest as "a
theosophist with a fiery temper and a considerable libido" and "very anti-Bolshevik". ==Works==