Son of Frederick William and Annie Elizabeth (nee FLECKNEY) DELDERFIELD of Aldbury, Herts; husband of Ivy (nee WELLING) DELDERFIELD of Berkhamsted, Herts.
His parents married 22 September 1886 at St John the Baptist, Aldbury. Frederick died 1930 in Aldbury aged 63, and was buried 20 June at St John the Baptist, Aldbury; Annie died 1935 in the Berkhamsted district aged 69.
William was born 3 September 1890 in Cheddington, Bucks, and baptised 2 November 1890 at St John the Baptist, Aldbury. He attended first Countess Rosebery’s Infants’ School, Cheddington, from 26 September 1893 to 2 July 1897; then Cheddington National Mixed School from 2 July 1897. He married Ivy Welling 12 November 1916 at St John the Baptist, Aldbury, and resided in Watford. Ivy remarried 2 April 1923 at St Dionis, Fulham, London, to Frederick Henry Matthews, and died 1926 in the Chelsea, London, district aged 35.
On the 1891 Census, aged 7 months he lived in Aldbury, with his parents and one sibling. On the 1901 Census, aged 10 he lived in Cheddington, with his parents and four siblings. On the 1911 Census, a domestic gardener aged 20, he lived in Aldbury, with his parents and six siblings.