Emma Du Marier, daughter of William Wightwick, married the writer and cartoonist George du Maurier in 1863. They had two sons (Major J. Du Maurier, George, and Guy), and three daughters.
She is referred to in JW's correspondence about 1896.
The Times, London, Wednesday 6 June 1915, p. 10; The Times, London, Friday, 19 February 1915, p. 11.