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

Context paragraphs:
Imprisoned Graves: The "Imprisoned Graves" are a set of graves in a small cemetery located in the Central Jail of Nicosia, where 13 EOKA fighters, during the 1955-1959 liberation struggle for the liberation of Cyprus from the United Kingdom, were interred.  Nine of them were hanged by British executioner Harry Allen, three were killed in action and one died in hospital from wounds.

Junaid Hussain: Junaid Hussain (Arabic: جنید حسین‎ ‎ , 1994 – 25 August 2015) was a British Pakistani black hat hacker and propagandist under the "nom de guerre" of Abu Hussain al-Britani who supported the Islamic State of Iraq and the Levant (ISIL).  Hussain, who grew up in Birmingham in a Pakistani-origin family, was jailed in 2012 for hacking Tony Blair's accounts and posting his personal information online.  Hussain left the UK around 2013 for Syria.  Sporadic reports surfaced from British media in 2014 speculating that Hussein could have been the infamous British executioner Mohamed Emwazi, then only known as his tabloid nickname "Jihadi John".

Josef Kramer: Josef Kramer (10 November 1906 – 13 December 1945) was the Commandant of the Bergen-Belsen concentration camp.  Dubbed The Beast of Belsen by camp inmates, he was a notorious German Nazi war criminal, directly responsible for the deaths of thousands of people.  He was detained by the British army after the Second World War, convicted of war crimes and hanged on the gallows in Hamelin prison by British executioner Albert Pierrepoint.

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.

Murder of Anthony Walker: Anthony Walker (21 February 1987 – 30 July 2005) was a Black British student of African descent from Huyton, Merseyside, England, who was murdered with an ice axe by Michael Barton (brother of footballer Joey Barton) and his cousin Paul Taylor, in an unprovoked racially motivated attack.  Walker was eighteen years old and was in his second year of A-levels.  He lived with his mother Gee Walker, his father Steve Walker, his two sisters and one brother.

Pierrepoint (film): Pierrepoint (titled Pierrepoint: The Last Hangman for North American release), is a 2005 British film directed by Adrian Shergold about the life of British executioner Albert Pierrepoint.

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.

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.

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.

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.

Supporting paragraphs: Arthur B. English John Ellis (executioner)
Answer: John Ellis