Frederick was the son of Annie Musham. There is no reference to his father's name in his service papers. Frederick had an older sister, Clara, whose date of birth was given on the 1939 England & Wales Register as 18 December 1886 although there is a record of the registration of the birth of a Clara Musham Knight in 1886 (Nottingham) but in the first quarter (J/F/M) of 1886.
From the information in the surviving documents from Frederick's service record, he was born in about 1893 and there is a record of the registration of the birth of a Frederick Musham in 1893 (J/F/M Nottingham).
Neither Frederick nor his mother have yet been traced on either the 1901 or 1911 Census, but at the time he enlisted they were living at 6 Daykins Yard, Court Street, Sneinton, Nottingham, and the later CWGC record also gives this as Annie's address.
An Annie Musham (b. 15 October 1866), 'widowed' and occupation given as unpaid domestic duties, was listed on the 1939 England & Wales Register living at 10 Burgess Terrace, Nottingham. Also in the household were George Lynes (b. 3 January 1915), a railway labourer, and his wife Hilda (b. 2 February 1916).
Annie may have died in 1943 (death registered A/M/J Sheffield) age 77.
Clara has not been traced positively on a census return before 1911. However, her name was included on a form listing Frederick's surviving blood relatives which was completed in 1920 by his mother for the Army. Annie gave only her name and Clara's who was 34 years old, married and living in Sheffield.
Clara Musham married Albert Dodsworth 1907 O/N/D Sheffield. They had at least four children (birth registrations give the mother's maiden name as Musham): Albert 1908 (O/N/D Sheffield), Edna 1912 (O/N/D Rotherham), Frank b. 1915 (O/N/D Sheffield), Cyril b. 2 October 1918 (O/N/D Sheffield).
In 1911 Clara (25) and Albert (23 b. Attercliffe), a miner, were living at 5 Albert Road, Parkgate, Rawmarsh, Yorkshire, with their two children Albert (2) and John Frederick (u/4m).
However, Clara's address in 1920, according to the information provided by her mother for the Army, was 257 Don Road, Sheffield, and this was still her address when the 1939 England & Wales Register was compiled, although Clara was now a widow. She died in 1956 (J/A/S Sheffield age 70).