Henry Dorey Stocker was born in Highfield, Southampton, Hampshire, England in 1892 and his birth was registered in the first quarter of that year. He was the son of George Robert Stocker (1859-1904) and Mary Rutt (1855-1921), both natives of Hampshire who had married in 1882.

Henry had at least seven siblings: Ellen Mary (b. 1883), William George (b. 1885), Ethel Lucy (b. 1888), Rose (b. 1889), May (b. 1894), Charlotte Jane (b. 1896) and Morington (b. 1898).

Henry first appears on the 1901 census when he and his family are living at an address in Commercial Street, Bitterne, Hampshire, his father being described as a jobbing gardener. Henry is absent from the 1911 census, but his widowed mother--his father having passed away in 1904--is listed as a domestic servant housemaid at Battenberg House, St Georges Place, Southampton and his younger siblings being scattered around different addresses.

When Henry signed on to the Titanic, on 6 April 1912, he gave his address as Middle Road, Sholing, Hampshire and his previous ship as the Olympic. As a trimmer he could expect to earn monthly wages of £6 10s.

Henry Stocker died in the sinking. His body, if recovered, was never identified.

Henry's mother Mary continued to live in Southampton and she died there in 1921.