People Ruth Darwin British psychiatrist20 August 1883 – 15 October 1972 Horace Darwin13 May 1851 – 22 September 1928Ida Darwin7 November 1854 – 5 July 1946 Ruth Darwin20 August 1883 – 15 October 1972William Rees-Thomas15 June 1887 – 13 April 1978 ParentsHorace Darwin13 May 1851 – 22 September 1928IIda Darwin7 November 1854 – 5 July 1946Spouses and partnersWWilliam Rees-Thomas15 June 1887 – 13 April 1978SiblingsEErasmus Darwin IV7 December 1881 – 24 April 1915NNora Barlow22 December 1885 – 29 May 1989 From Wikipedia and Wikidata (public domain), updated daily.