Question: Who had only one brother and was a british executioner for 23 years?

full_context: Document 1: Harry Allen (executioner): Harry Bernard Allen (5 November 1911 – 14 August 1992) was one of Britain's last official executioners, officiating between 1941 and 1964. He was chief executioner at 41 executions and acted as assistant executioner at 53 others, at various prisons in England, Scotland, Northern Ireland, the Channel Islands and Cyprus. He acted as assistant executioner for 14 years, mostly to Albert Pierrepoint from 1941 to 1955.
Document 2: Thomas Pierrepoint: Thomas William Pierrepoint (1870 – 11 February 1954) was a British executioner from 1906 until 1946. He was the brother of Henry and uncle of Albert.
Document 3: Henry Pierrepoint: Henry Albert Pierrepoint (1878 – 14 December 1922) was a British executioner from 1901 until 1910. He was the father of Albert and brother of Thomas.
Document 4: Arthur B. English: Arthur Bartholomew English was a British man who became Canada's hangman in 1912, when he was officially offered the job. Prior to this he had been an assistant to John Radclive, a veteran of twenty years of hangings. English served in this capacity until 1935. He probably used the pseudonym of Arthur Ellis after the famous English executioner, John Ellis: there is no truth in the story that John Ellis was his uncle, as John Ellis only had one brother, James Preston who was born in 1887, and therefore would have been only 25 when Arthur Ellis started his career. It is estimated that English carried out more than 600 hangings over his career. Several of his successors adopted the same pseudonym.
Document 5: Edwin Davis (executioner): Edwin F. Davis (May 28, 1846 – May 26, 1923), of Corning, Steuben County, New York was the first "state electrician" (executioner) for the State of New York. In 1890, Davis finalized many features of the first electric chair used. Davis performed 240 executions between 1890 and 1914, including the first person to be executed by electric chair, William Kemmler, and the first woman Martha M. Place, as well as the assassin of William McKinley, Leon Frank Czolgosz.
Document 6: Arthur Lucas: Arthur Lucas, originally from the U.S. state of Georgia, was one of the two last people to be executed in Canada, on December 11, 1962. Lucas had been convicted of the murder of a police informant from Detroit. The murder took place in Toronto.
Document 7: John Straffen: John Thomas Straffen (27 February 1930 – 19 November 2007) was an English serial killer who was the longest-serving prisoner in British legal history. Straffen killed two young girls in the summer of 1951. He was found to be unfit to plead and committed to Broadmoor Hospital; during a brief escape in 1952, he killed again. This time, he was convicted of murder and sentenced to death. Reprieved because of his mental state, he had his sentence commuted to life imprisonment, and he remained in prison until his death more than 55 years later.
Document 8: John Ellis (executioner): John Ellis (4 October 1874 – 20 September 1932) was a British executioner for 23 years, from 1901 to 1924. His other occupations were as a Rochdale hairdresser and newsagent.
Document 9: John Hulbert (executioner): John W. Hulbert, Jr. (also John Hurlbert) (September 1867, Auburn, New York – February 22, 1929, Auburn, New York) was the executioner for the states of New York, New Jersey and Massachusetts from 1913 to 1926. Hulbert was trained as "state electrician" by his predecessor, Edwin F. Davis, and oversaw 140 executions during his tenure.
Document 10: Julius Elias, 1st Viscount Southwood: Elias was born in Birmingham, the youngest of the seven children of David Elias, a Whitby a jet salesman. After moving to London where his father had set up a newspaper business, Elias began delivering newspapers in Hammersmith. He left school at the age of 13 to take up a job as a junior clerk at Odhams Bros, then a small printing firm. He worked his way up to become managing director and eventually chairman of the firm, which after a merger with "John Bull" in 1920 took the name Odhams Press Ltd. He was also managing director and chairman of the company that controlled the "Illustrated London News". Elias was raised to the peerage as Baron Southwood, of Fernhurst in the County of Sussex, in 1937. In 1944 he was appointed Chief Whip of the Labour Party in the House of Lords, which he remained until the following year. In January 1946 he was made Viscount Southwood, of Fernhurst in the County of Sussex.
Document 11: Edwin Brown (actor): He had a lengthy career in television, often playing policemen or similar roles. His film roles included a prison warder in the comedy "Two-Way Stretch" (1960), and Albert Pierrepoint, the hangman, in "10 Rillington Place" (1971).
Document 12: Richard Brandon: Richard Brandon (died 20 June 1649) was a 17th-century English hangman who inherited his role from his father Gregory Brandon and was sometimes known as "Young Gregory". Richard Brandon is often named as the executioner of King Charles I.
Document 13: List of people executed in Texas, 1920–29: The following is a list of people executed by the U.S. state of Texas between 1920 and 1929. A total of 66 individuals were executed during this period. From 1920 to 1923, ten individuals were executed by hanging. The last hanging in the state was that of Nathan Lee, a man convicted of murder and executed in Brazoria County on August 31, 1923. The law was changed in 1923 requiring executions be carried out on the electric chair and that they take place at the Huntsville Unit in Huntsville, Texas. From 1924 to 1929, 56 individuals were executed by electrocution, the first 5 individuals executed by this method took place on February 8, 1924 (this remains a state record for the number of executions in a single day).
Document 14: Susan Newell: Susan Newell (1893 – 10 October 1923) was the last woman to be hanged as capital punishment in Scotland. She was arrested after acting suspiciously and the discovery of the body of a thirteen year old newspaper boy, John Johnston. Although there were no witness accounts of him being killed, circumstantial evidence was presented at her trial. She was found guilty of his murder, a plea of insanity was rejected and she was sentenced to death.
Document 15: Albert Pierrepoint: Albert Pierrepoint ( ; 30 March 1905 – 10 July 1992) was a long-serving hangman in England. He executed at least 400 people, including William Joyce ("Lord Haw-Haw") and John Amery. In Germany and Austria, after the Second World War, he executed some 200 people who had been convicted of war crimes. In England, Pierrepoint hanged Timothy Evans for a crime committed by his neighbour John Christie, who was also hanged by Pierrepoint.
ground_truth: John Ellis