Mr William Henry Snook (Trimmer) was born in Bristol, Gloucestershire, England in the closing months of 1886 and was later baptised on 21 January 1887.
He was the son of Edwin Snook (b. 1856) and Sarah Ann Bolt (b. 1856), Bristol natives who were married in 1875. His father worked as a foreman manager and later a stevedore and dock labourer.
He had seven known siblings: Edwin (1875-1876), Arthur George (1877-1878), Florence Elizabeth (b. 1880, later Mrs John Joseph Sheehan), Edwin Frank (b. 1881), Clara Eliza (1882-1970, later Mrs Albert Nash), Lily Beatrice (1890-1892) and Daisy Bertha May (1895-1974, later Mrs Frederick Lock).
William first appears on the 1891 census living with his family at 29 Charles Street, Barton Regis, Gloucestershire. Living at 34 Charles Street, Bristol on the 1901 census with his family, William was described as a tramways labourer. His father died in 1903 and his mother in 1910. William was not present for the 1911 census but his younger sister was shown living at 25 Tudor Road, Easton, Bristol, the home of her sister Clara Nash and her family. She was described as a sewing machinist. His brother Edwin was a veteran of the Royal Navy.
When he signed on to the Titanic on 10 April 1912, Snook gave his local address as the Sailor's Home in Southampton and his previous ship as the Royal Edward. As a trimmer he could expect monthly wages of £5, 10s.
William Snook died in the sinking and his body, if recovered, was never identified.
His last surviving sibling was his sister Daisy who died in Sodbury, Gloucestershire in 1974.