Question: Pippa Middleton married married the heir to the title of what?

Context articles: James Matthews (racing driver)
Baron Middleton
Pippa Middleton
Iskandar of Johor
Carole Middleton
Duke of Rothesay
Hobbs Ltd
John Parker (Continental Congress)
Baron Wotton
Baron Cottesloe

James Spencer Matthews (born 21 August 1975) is a British former professional racing driver, hedge fund manager, and heir to the Scottish courtesy title of Laird of Glen Affric.
 In 2017, he married Philippa Middleton, younger sister of Catherine, Duchess of Cambridge.
Baron Middleton, of Middleton in the County of Warwick, is a title in the Peerage of Great Britain.
 It was created in 1711 for Sir Thomas Willoughby, 2nd Baronet, who had previously represented Nottinghamshire and Newark in Parliament.
 The Willoughby Baronetcy, of Wollaton in the County of Nottingham, had been created in the Baronetage of England in 1677 for his elder brother Francis Willoughby, with special remainder to the latter's only brother Thomas, who succeeded him in 1688.
 Lord Middleton was succeeded by his eldest son, the second Baron.
 He sat as Member of Parliament for Nottinghamshire and Tamworth.
 On the death of his younger son, the fourth Baron (who had succeeded his elder brother), the line of the eldest son of the first Baron failed.
 He was succeeded by his cousin Henry Middleton, the fifth Baron.
 He was the son of the Hon. Thomas Willoughby (c. 1694–1742), second son of the first Baron.
 On the death of his son, the sixth Baron, this line of the family also failed.
Philippa Charlotte Middleton ( ; born 6 September 1983) is an English socialite, author, columnist, and the younger sister of Catherine, Duchess of Cambridge.
 Middleton began receiving media attention with her appearance as the maid of honour at her sister's wedding to Prince William.
 After marrying James Matthews in 2017, she will be styled Lady Glen Affric should he inherit his father's title.
Baginda Al Mutawakkil Alallah Sultan Iskandar Ibni Almarhum Sultan Al-Khalidi (8 April 1932 – 22 January 2010) was the 24th Sultan of Johor and the 4th Sultan of modern Johor.
 He succeeded his father, Sultan Ismail, upon the former's death on 10 May 1981, and was the eighth Yang di-Pertuan Agong (Malay for Supreme King or High King) of Malaysia, from 26 April 1984 to 25 April 1989.
 Sultan Iskandar reign lasted for almost 29 years until his death in January 2010, upon which he was succeeded by his oldest son, Sultan Ibrahim Ismail.
 His children are married into the different royal houses of Malaysia.
 His eldest daughter, Tunku Kamariah, the Tengku Puan Laksamana, married the Tengku Laksamana of Selangor, Tengku Sulaiman Shah.
 His successor and eldest son, Sultan Ibrahim married into the Perak Royal Family by marrying Raja Zarith Sofiah.
 His daughter, Tunku Azizah married the heir apparent of Pahang, Tengku Abdullah.
 His younger son, Tunku Abdul Majid married a member of the Kedah Royal Family, Tunku Teh Mazni.
Carole Elizabeth Middleton ("née" Goldsmith; born 31 January 1955) is a former flight attendant turned businesswoman, and mother of Catherine, Duchess of Cambridge, and her siblings, Pippa Middleton and James Middleton.
Duke of Rothesay (Scottish Gaelic: "Diùc Baile Bhòid" , Scots: "Duik o Rothesay" ) is a dynastic title of the heir apparent to the British throne, currently Prince Charles.
 It was a title of the heir apparent to the throne of the Kingdom of Scotland before 1707, of the Kingdom of Great Britain from 1707 to 1801, and now of the United Kingdom of Great Britain and Northern Ireland.
 It is the title mandated for use by the heir apparent when in Scotland, in preference to the titles "Duke of Cornwall" (which also belongs to the eldest living son of the monarch, when and only when he is also heir apparent, by right) and "Prince of Wales" (traditionally granted to the heir apparent), which are used in the rest of the United Kingdom and overseas.
 The Duke of Rothesay also holds other Scottish titles, including those of Earl of Carrick, Baron of Renfrew, Lord of the Isles and Prince and Great Steward of Scotland.
 The title is named after Rothesay on the Isle of Bute, Argyll and Bute, but is not associated with any legal entity or landed property, unlike the Duchy of Cornwall.
Hobbs is a women’s clothing, footwear and accessories retailer based in London, UK.
 It was founded in Hampstead in 1981 and began as a shoe retailer.
 Hobbs now has stores across the United Kingdom and concession stores in the United States and Germany.
 The online store serves 55 countries worldwide.
 Hobbs is popularly associated with clothing priced in the mid range for a customer base that is largely middle-aged and older.
 Among its best-known customers are the Duchess of Cambridge and her sister, Pippa Middleton.
John Parker IV (June 24, 1759 – April 20, 1832) by birth inherited a spot in South Carolina's aristocracy.
 He was born to John Parker III and Mary Daniell, granddaughter of Governor Robert Daniell.
 He married Susannah Middleton, daughter of Henry Middleton and sister of Arthur Middleton.
 He was American planter of the Hayes Plantation and lawyer from Charleston, South Carolina.
 He also served as a delegate for South Carolina to the Congress of the Confederation from 1786 to 1788.
Baron Wotton was a title that was created twice in the Peerage of England.
 The first creation came in 1603 for Sir Edward Wotton, of Boughton Place, Boughton Malherbe, Kent, a descendant of Nicholas Wotton (d. 1448), twice Lord Mayor of London, who married Joan Corbye, heiress of Boughton Malherbe and settled at Boughton Place.
 Edward, in 1594 followed several of his forebears as High Sheriff of Kent and served as Ambassador to Queen Elizabeth I.
 After the death of his son and heir, the second Baron, in 1630, without male issue, the barony became extinct.
 His estate passed to his eldest daughter the Honourable Katherine, who firstly married Henry Stanhope, Lord Stanhope.
 She was created Countess of Chesterfield for life on his death and later married Jehan van Kerkhoven.
 The title was revived for her son by her second husband, Charles Henry, who also created Earl of Bellomont in 1680.
 For more information on the second creation, which became extinct in 1683, see Earl of Bellomont.
Baron Cottesloe, of Swanbourne and Hardwick in the County of Buckingham, is a title in the Peerage of the United Kingdom.
 It was created in 1874 for the Conservative politician and former Chief Secretary for Ireland, Sir Thomas Fremantle, 1st Baronet (1798–1890).
 He was the son of Admiral Sir Thomas Fremantle (1765–1819).
 Lord Cottesloe had already been created a Baronet, of Swanbourne in the County of Berkshire, in 1821, chiefly in recognition of his father's services, and with remainder to the latter's heirs.
 His father Sir Thomas Fremantle was created Baron Fremantle, of the Austrian Empire, which Lord Cottesloe inherited in 1819 with the death of his father.
 Subsequently, in 1822 he was given a Royal licence, which authorized him and his successors to use the title in Britain.
 However, a warrant issued on 27 April 1932 withdrew all the royal licences, only allowing the use of the title to the then current holders, their heir (if any was born) and their heir's heir (if any was born).
 Nowadays, John Fremantle, 5th Baron Cottesloe is the current holder of this title, and his son Hon. Thomas Henry Fremantle, heir to the Cottesloe Barony, will be the last future holder being allowed to use the Austrian title in the United Kingdom.