Mr William Henry Egg was born in Bow, Middlesex, England in the second quarter of 1864.

His parents were William Henry Egg (1832-1902), a railway worker, and Agnes Matilda Evered (1827-1901), both Middlesex natives who had married in Poplar in 1852.

One of six known children, William's siblings were: Matilda Ann (b. 1856), Agnes Ann (b. 1858), Emily (b. 1860), Louisa (b. 1868) and Alice (b. 1870).

William first appears on the 1871 census living at 79 Thackeray (?) Road in St Leonard, Shoreditch, Middlesex. Living at 38 Coburn Street by the time of the 1881 census his father is now described as a house decorator but William at this time had no stated profession. It is known, however, that he followed in his father's footsteps to become a house decorator before he began a career as an estate agent.

William was married in Holy Trinity Church, Mile End, London on 25 August 1885 to fellow Londoner Selina Harriet Marcham (b. 1867) and William was described as a house decorator, specifying his address as 38 Coburn Street. They would have three children: William George (b. 7 April 1886), Ernest Henry (b. 3 October 1888) and Lena Marie Florence (b. 29 September 1890) who were all educated in Stafford Road School in Tower Hamlets, London.

The family appear on the 1891 census living at Raverley (?) Street in Bromley and William is described as a carman (?). They have moved to 21 Castle Avenue in Walthamstow, Essex by the time of the 1901 census and William is now described as an estate agent. When he began a career at sea is not certain but by the time of the 1911 census William is absent and his wife and daughter are living at 58a London Road, West Croydon where his wife is described as a confectioner.

When Egg signed-on to the Titanic, on 4 April 1912, he gave his address as 1a Brixton Trent Road, Surrey. His previous ship had been the Majestic and as a third class steward he received monthly wages of £3, 15s.

William Egg died in the sinking and his body, if recovered, was never identified.

Following the disaster his widow Selina later made her home at 65 Horsford Road in Brixton Hill, Surrey and she died on 28 November 1918.

His son William served during WWI and was married on 12 January 1918 to Alice Gwendoline Keyes (b. 1887) and they had a daughter named Irene the following year. They later emigrated to Canada and settled in Ontario but what became of them is currently unknown.

His son Ernest later worked as a theatre manager and was married in London on 2 June 1915 to Emily Sophia Turner (1891-1955) and they had three known children, Lena, William and Marie. Records appear to show that the family settled in Somerset and his wife died there in 1955. What became of Ernest is unclear.

Egg's daughter Lena married Adrien Vaucher (1890-1964), a watchmaker, in September 1917 and had two children, William and Madeleine. She died in Berkshire in 1963.