Wemyss was born in Kensington, Middlesex, one of the thirteen children of Captain Charles Henry Augustus Lutyens (1829–1915), a soldier and painter, and Mary Theresa Gallwey (c. 1832–1906) from Killarney, Ireland.
[1] She was baptised as Mary Constance Elphinstone on 20 February 1868 at St Paul's, Onslow Square, Kensington.
[1] On 6 March 1890, at Holy Trinity Brompton, Knightsbridge, aged 22 and still living at 16, Onslow Square, Mary Lutyens married George Wemyss, a captain in the West Yorkshire Regiment, who gave his father's name as Frederick Augustus von Wachsmann.
Reviewing her Oranges and Lemons in 1919, Punch noted Mrs. George Wemyss has for some time past specialised in spinster-aunts, bachelor-uncles and charming nieces.
[9] George Wemyss died at home at Atcombe Court, Woodchester, Gloucestershire, in March 1944, leaving an estate valued at £22,920.