George was the eldest son of George William and Sarah Ann Smith (née Ward).
His father George William was born in Farnsfield, Nottinghamshire, in 1867, the son of Henry Smith. His mother Sarah Ann was born in Edingley, Nottinghamshire, in about 1865, the daughter of William Ward, a farm bailiff.
George and Sarah were married at Blidworth St Mary on 1 March 1892. They had eight children of whom seven survived infancy or childhood: George William Harcourt Avondale b. 10 March 1892, Noel b. 1896, Mona Sylvia b. 1898, Sarah Adelaide b. 1899, Gordon Selwyn b. 1901, Doris Caroline b. 1903 and Jack Evans b. 1905.
In 1901 George William, a house decorator, and Sarah were living at 6 Brickyard Lane, Farnsfield, with their four children George (named as Harcourt), Noel, Mona and Sarah (named as Adelaide).
George William had died by the time of the 1911 Census, probably in 1909 at the age of 42. His widow Sarah was still living in Farnsfield and six of her children were in the home on the night of the census; Noel a sheep boy on a farm, Mona, Sarah, Gordon, Doris and Jack. Also in the household was a boarder, Robert Henry Barton (50) a married farm labourer. George had joined the Royal Navy some six months earlier.
George's mother was living at 125 Quarter Street, Farnsfield, at the time of her son's death and Quarter Street, Farnsfield, is also given as her address on the later CWGC record. Sarah Ann Smith may have died in 1928 aged 63.
George's sister Mona Sylvia married Frank W Comeskey in 1919. Frank had served in the Durham Light Infantry during the Great War; he had enlisted on 11 August 1914 and was demobilised on 11 March 1919. He rejoined the Army (Royal Army Medical Corps, 7253603 Corporal) and died in Egypt on 30 July 1927. His legatee was his widow, Mona. Mona married Thomas Woodcock in 1930.