Bertram was the third child of John and Anne Bacon (née Boyington).
His father John was born in 1864 in Chesterfield (bap. St Mary & All Saints April 1864), the son of James and Mary Bacon. His mother Anne Boyington was born in Nottingham in 1865.
John and Anne were married at Carrington St John the Evangelist in July 1885 and had seven children, including a daughter who died in infancy: Clarence Clifford b. 1885 bap St John July 1885, Leonard Raymond b. 1887, Bertram Wilfred b. 1889, Maude Winifred b. 1891 bap. St John May 1892 d. 1893 (J/F/M), Ernest b. 1892, May Grace birth registered 1894 (J/F/M) and Cyril Francis birth registered 1904 (J/F/M).
The couple were living at Market Place, Carrington, when their son Clarence was baptised in 1885 but had moved to 3 Birchin Street by 1901: John, a printer compositor, his wife and three of their children, Clarence (6), Bertram (2) and Maude (under 1 year). Their son Leonard (4) was recorded on the census at Flewitt Street, Nottingham, in the home of his paternal grandparents, James Bacon, a hat and cap maker, and his wife Mary.
By 1901 John, now a printer's manager, and Anne were living at 44 Loscoe Road, Carrington, with their children Clarence, a compositor printer, Leonard a stable boy (laundry), Bertram, Ernest and Grace. Their daughter Maude had died in 1893 before her second birthday. The youngest child, Cyril, was born three years later in 1904.
By 1911 John, a commercial traveller (printers), Annie, and three of their children, Ernest a grocer's assistant, Grace a machinist (lace net) and Cyril, were living at 31 Sherbrook Road, Carrington. Clarence and Bertram were now married; Clarence to Elizabeth Jefford in 1904 and Bertram to Eleanor Mabel Stainsby in 1908. Leonard had joined the Royal Navy in 1901 and was serving at HMS Vernon, the RN's torpedo school (afloat) in Portsmouth, although on the night of the 1911 census (2 April) he was at the Royal Sailors' Rest, Commercial Road, Portsmouth. He served in the Royal Navy until 1919. (See 'Extra information')
Ann Bacon died in September 1935; as well as her husband John and son Bertram, her second daughter Grace had predeceased her (Grace May Pell, m. Arthur Richard Pell 1916 d. September 1930).
Bertram married Eleanor Mabel (Mabel) Stainsby (b. 1889) in 1908 (reg. J/F/M) and they had three children, Bernard Victor b. July 1908 Stella b. 1909 and Bertram Wilfred b. January 1912. Bertram, his wife and their two children, Bernard and Stella, were living at 82 Leicester Street, St Ann's, Nottingham, in 1911. Their secod son, Bertram, was born the following year. The local paper, which reported in September 1915 that Bertram was 'wounded and missing', gave his address as 31 Sherbrooke Road, Carrington, his parents' home.
Bertram's widow married John Buxton (22) at Birkdale St Peter, Lancashire, in October 1917. According to the information on the marriage certificate, John was a serving soldier with the 3rd Bn. The King's (Liverpool Regiment) at Pembroke Barracks, Pembroke Docks, Wales, in the parish of Pembroke St John. Mabel (28) was living on New Road, Birkdale, Lancashire, in the parish of St Peter where the couple were married in October 1917. They had a daughter Iris M. (b. 1925). The later CWGC record gave their address as 11 St. Cecilia Terrace, Peas Hill Road, Nottingham. Mabel died in 1927 and in 1934 her husband married Beatrice H Andrews.