Question: Henry Edward FitzClarence is the illigitimate son of the futer King William IV and which woman?

Context articles: Fenton House
Lady Augusta Gordon
Lord Frederick FitzClarence
Regency Act 1830
Elizabeth Hay, Countess of Erroll
William FitzClarence, 2nd Earl of Munster
Wilhelmina FitzClarence, Countess of Munster
Henry FitzClarence
Dorothea Jordan
Anthony FitzClarence, 7th Earl of Munster

Fenton House is a 17th-century merchant's house in Hampstead in North London which belongs to the National Trust, bequeathed to them in 1952 by Lady Binning, its last owner and resident.
 It is a detached house with a walled garden, which is large by London standards, and features roses, an orchard and a working kitchen garden.
 The interior houses the Benton Fletcher collection of early keyboard instruments, some of which are often played for visitors during operational hours, and collections of paintings (including the collection of Peter Barkworth, and loans of Sir William Nicholson paintings), porcelain, 17th-century needlework pictures and Georgian furniture.
 It also has fine portraits of Dorothea Jordan, William IV, George IV, Frederick FitzClarence and Adolphus Fitzclarence - one of Jordan's daughters by William IV lived in the house.
Lady Augusta Gordon ("née" FitzClarence; 17 November 1803 – 8 December 1865) was a British noblewoman.
 Born the fourth illegitimate daughter of William IV of the United Kingdom (then Duke of Clarence) by his long-time mistress Dorothea Jordan, she grew up at their Bushy House residence in Teddington.
 Augusta had four sisters and five brothers all surnamed FitzClarence.
 Soon after their father became monarch, the FitzClarence children were raised to the ranks of younger children of a marquess.
Lieutenant-General Lord Frederick FitzClarence, GCH (9 December 1799 – 30 October 1854) was a British Army officer as well as being the illegitimate third son of King William IV and his mistress, Dorothea Jordan.
The Regency Act 1830 (1 Will.4 c.2) was an Act of the Parliament of the United Kingdom passed to cater for the event that King William IV died while the next person in line to the throne was not yet aged 18.
 It provided for a regency until the new monarch reached the age of 18, and also would have enabled a posthumous child of King William IV to replace Queen Victoria on the throne.
 However, the Act never came into force, because William was not survived by a legitimate child and Victoria became queen at the age of 18 in 1837.
Elizabeth Hay, Countess of Erroll (17 January 1801 – 16 January 1856; born Elizabeth FitzClarence) was an illegitimate daughter of King William IV of the United Kingdom and Dorothea Jordan.
 She married William Hay, 18th Earl of Erroll, and became Countess of Erroll on 4 December 1820 at age 19.
 Due to Hay's parentage, William Hay became Lord Steward of the Household.
 Elizabeth and William Hay married at St George's, Hanover Square.
 Hay is pictured in a FitzClarence family portrait in House of Dun and kept a stone thrown at her father William IV and the gloves he wore on opening his first Parliament as mementos.
 She died in Edinburgh, Scotland.
William FitzClarence, 2nd Earl of Munster, (19 May 1824 – 30 April 1901), styled Viscount FitzClarence from 1831 to 1842, was a British peer, and the grandson of King William IV, whom he was named after, and who died in 1837, aged almost 72, when the younger William was just 13.
Wilhelmina FitzClarence, Countess of Munster ("née" Kennedy-Erskine; 27 June 1830 – 9 October 1906) was a British peeress and novelist.
 Her mother, Lady Augusta FitzClarence, was an illegitimate daughter of William IV of the United Kingdom; Wilhelmina, also known as Mina, was born the day after William's succession as monarch.
 She travelled as a young girl throughout Europe, visiting the courts of France and Hanover.
 In 1855, Mina married her first cousin William FitzClarence, 2nd Earl of Munster; they would have nine children, including the 3rd and 4th Earls of Munster.
Henry Edward FitzClarence (27 March 1795 – September 1817), was the second eldest illegitimate son of William IV by his longtime mistress Dorothea Jordan.
 Born in Petersham, he died unmarried in India in 1817 at age 22 before his father's death.
Dorothea Jordan (22 November 17615 July 1816) was an Anglo-Irish actress, courtesan, and the mistress and companion of the future King William IV of the United Kingdom, for 20 years while he was Duke of Clarence.
 Together they had ten illegitimate children, all of whom took the surname "FitzClarence".
Anthony Charles FitzClarence, 7th Earl of Munster (21 March 1926 – 30 December 2000) was the last Earl of Munster, Viscount FitzClarence and Baron Tewkesbury.
 The Earl of Munster was the last of the senior male line of FitzClarences that began with King William IV (Duke of Clarence until his accession in 1830) and his mistress, the comic actress Dorothea Jordan (née Bland).