Question: Who was the father of Isabel Marshal's husband>

Context paragraphs:
Tokyo ESP: Tokyo ESP (東京<ruby ><rb>ESP</rb><rp> (</rp><rt >イーエスプー</rt><rp>)</rp></ruby> , Tōkyō Īēsupī ) is a Japanese manga series by Hajime Segawa.  It began serialization in the April 2010 issue of Kadokawa Shoten's "Shōnen Ace" magazine.  It follows a high school girl named Rinka Urushiba who lives with her father in poor conditions.  This leads her to work part-time as a waitress.  Her life changes when she gains the ability to use extrasensory perception (ESP).  An anime television series adaptation aired from July to September 2014.

Richard de Clare, 6th Earl of Gloucester: Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester, 2nd Lord of Glamorgan, 8th Lord of Clare (4 August 1222 – 14 July 1262) was son of Gilbert de Clare, 4th Earl of Hertford and Isabel Marshal.  On his father's death, when he became Earl of Gloucester (October 1230), he was entrusted first to the guardianship of Hubert de Burgh.  On Hubert's fall, his guardianship was given to Peter des Roches (c. October 1232); and in 1235 to Gilbert, Earl Marshall.  He was also a powerful Marcher Lord in Wales and inherited the Lordship of Glamorgan upon the death of his father.

Amice de Clare: Amice de Clare (c. 1220 – 1284) was the daughter of Gilbert de Clare, 4th Earl of Hertford and Isabel Marshal.  She married, firstly, Baldwin de Redvers, 6th Earl of Devon, and secondly Robert de .  She founded Buckland Abbey.

Isabel Marshal: Isabel Marshal (9 October 1200 – 17 January 1240) was a medieval English countess.  She was the wife of both Gilbert de Clare, 4th Earl of Hertford and 5th Earl of Gloucester and Richard, 1st Earl of Cornwall (son of King John of England).  With the former, she was a great grandparent of King Robert the Bruce of Scotland.

Richard, 1st Earl of Cornwall: Richard (5 January 1209 – 2 April 1272), second son of John, King of England, was the nominal Count of Poitou (1225-1243), Earl of Cornwall (from 1225) and King of Germany (from 1257).  He was one of the wealthiest men in Europe and joined the Barons' Crusade, where he achieved success as a negotiator for the release of prisoners and assisted with the building of the citadel in Ascalon.

Henry of Almain: Henry of Almain (Anglo-Norman French: "Henri d'Almayne") (2 November 1235 – 13 March 1271) was the son of Richard, 1st Earl of Cornwall and his first wife Isabel Marshal.  His surname is derived from a vowel shift in pronunciation of "d'Allemagne" (English: of Germany), so called by the elites of England because of his father's status as the elected German King of the Romans (the "King of Almayne").

Isabella of Gloucester and Hertford: Isabella de Clare (2 November 1226 – 10 July 1264) was the daughter of Gilbert de Clare, 4th Earl of Hertford and 5th Earl of Gloucester and Isabel Marshal.  She is also known as "Isabel de Clare", but this is however, the name of many women in her family.

Anu: Anu (Akkadian: 𒀭𒀭 AN , "Anu‹<a href="mimation">m</a>›") or An (<a href="Sumerian%20language">Sumerian</a>: 𒀭 AN , from <a href="wikt%3A%F0%92%80%AD%23Sumerian">𒀭</a> "an" "sky, heaven") is the earliest attested <a href="sky%20father">sky-father</a> <a href="deity">deity</a>.  In Sumerian religion, where is he first known to have been worshiped, he was also "King of the Gods", "Lord of the Constellations, Spirits and Demons", and "Supreme Ruler of the Kingdom of Heaven", where Anu himself wandered the highest Heavenly Regions.  He was believed to have the power to judge those who had committed crimes, and to have created the stars as soldiers to destroy the wicked.  His attribute was the Royal Tiara.  His attendant and vizier was the god Ilabrat.

List of Royal Australian Air Force air marshals: The following is a list of Australians who have attained air marshal rank within the Royal Australian Air Force (RAAF); that is, service personnel who have held the rank of air chief marshal (four-star rank), air marshal (three-star rank) or air vice marshal (two-star rank).  The Royal Australian Air Force was established in 1921 as a separate branch of the Australian military forces.  The service was modelled after the Royal Air Force—formed three years earlier—and adopted the same ranking system.  Richard Williams, regarded as the "father" of the Royal Australian Air Force, was the service's first member to obtain air-officer rank on being promoted to air commodore (one-star rank) in 1927; he went on to become the first air vice marshal (1935) and air marshal (1940).  In 1965, Sir Frederick Scherger became the first officer to be advanced to air chief marshal, one of only four members of the Royal Australian Air Force to obtain this rank as of June 2014.  A further nineteen individuals have reached air marshal in the RAAF and 126 air vice marshal; seven officers have retired with the honorary rank of air vice marshal.

Isabel Martínez de Perón: María Estela Martínez Cartas de Perón (born 4 February 1931), better known as Isabel Martínez de Perón (] ) or Isabel Perón, served as President of Argentina from 1974 to 1976.  She was the third wife of President Juan Perón.  During her husband's third term as president from 1973 to 1974, Isabel served as both vice president and First Lady.  Following her husband's death in office in 1974, Isabel served as president of Argentina from 1 July 1974 to 24 March 1976.  She holds the distinction of being the first female to have the title of "President" in any country in the world.

Supporting paragraphs: Isabel Marshal Richard, 1st Earl of Cornwall
Answer: John, King of England