 Catherine Edith Macauley Mackay married Frederick "Fred" Martin (9 April 1848 – 27 April 1909) on 4 March 1882 at St Paul's Church, Adelaide.They had no children.Fred's sister Lucy Martin (1839–1863) was married to John Howard Clark, editor of the South Australian Register; another sister, Annie Montgomerie Martin, was a noted teacher and headmistress.