Question: Vice-Admiral Frederick Spencer, 4th Earl Spencer was made a Knight of the Garter, an order of chivalry founded by whom?

Context articles: Charles Spencer, 6th Earl Spencer
Albert Spencer, 7th Earl Spencer
Order of the Star (France)
Althorp
Robert Spencer, 4th Earl of Sunderland
Frederick Spencer, 4th Earl Spencer
Order of the Garter
Louis Spencer, Viscount Althorp
Lady Amelia Spencer
Lady Eliza Spencer

Charles Robert Spencer, 6th Earl Spencer, (30 October 1857 – 26 September 1922), styled The Honourable Charles Spencer until 1905 and known as The Viscount Althorp between 1905 and 1910, was a British courtier and Liberal politician from the Spencer family.
 An MP from 1880 to 1895 and again from 1900 to 1905, he served as Vice-Chamberlain of the Household from 1892 to 1895.
 Raised to peerage as Viscount Althorp in 1905, he was Lord Chamberlain from 1905 to 1912 in the Liberal administrations headed by Sir Henry Campbell-Bannerman and H. H. Asquith.
 In 1910, he succeeded his half-brother in the earldom of Spencer.
 He was married to Margaret Baring, a member of the Baring family.
 They were great-grandparents of Diana, Princess of Wales.
Albert Edward John Spencer, 7th Earl Spencer {'1': ", '2': ", '3': ", '4': "} , (23 May 1892 – 9 June 1975), styled The Honourable Albert Spencer until 1910 and as Viscount Althorp from 1910 to 1922, and known less formally as "Jack" Spencer, was a British peer.
 He was the paternal grandfather of Diana Spencer, who was just under 14 years old at the time of his death.
 Diana would go on to marry Charles, Prince of Wales, heir to the British throne, six years later.
The Order of the Star (French: "Ordre de l'Étoile" ) was an order of chivalry founded on 6 November 1351 by John II of France in imitation of the Order of the Garter founded in 1347 by Edward III of England.
 The inaugural ceremony of the order took place on 6 January 1352 at Saint-Ouen, from which it is sometimes called the Order of Knights of the Noble House of Saint Ouen.
Althorp ( or ) is a Grade I listed stately home, estate and small civil parish in Daventry District, Northamptonshire, England of about 13,000 acre .
 By road it is about 6 mi northwest of the county town of Northampton and about 75 mi northwest of central London.
 It has been held by the prominent aristocratic Spencer family for more than 500 years, and has been owned by Charles Spencer, 9th Earl Spencer since 1992.
 It was also the home of his sister, Lady Diana Spencer later Princess of Wales, before her marriage to Charles, Prince of Wales.
Robert Spencer, 4th Earl of Sunderland (24 October 1701 – 15 September 1729) was a British peer from the Spencer family, the son of the Whig politician, Charles Spencer, 3rd Earl of Sunderland.
 His mother was Lady Anne Churchill, the daughter of John Churchill, 1st Duke of Marlborough and Sarah Churchill, Duchess of Marlborough.
 Known as Lord Spencer between 1702 and 1722, he succeeded to the Earldom after his father's death in, but died in 1729 with no children.
 Therefore, his brother, Charles, became 5th Earl of Sunderland, and subsequently 3rd Duke of Marlborough after the death of his aunt, Henrietta Godolphin ("née" Churchill), 2nd Duchess of Marlborough.
Vice-Admiral Frederick Spencer, 4th Earl Spencer KG, CB, PC (14 April 1798 – 27 December 1857), styled The Honourable Frederick Spencer until 1845, was a British naval commander, courtier, and Whig politician.
 He initially served in the Royal Navy and fought in the Napoleonic Wars and the Greek War of Independence, eventually rising to the rank of Vice-Admiral.
 He succeeded his elder brother as Earl Spencer in 1845 and held political office as Lord Chamberlain of the Household between 1846 and 1848 and as Lord Steward of the Household between 1854 and 1857.
 In 1849 he was made a Knight of the Garter.
The Most Noble Order of the Garter is an order of chivalry founded by Edward III in 1348 and regarded as the most prestigious British order of chivalry (though in precedence inferior to the military Victoria Cross and George Cross) in England and the United Kingdom.
 It is dedicated to the image and arms of Saint George, England's patron saint.
Louis Frederick John Spencer, Viscount Althorp (born 14 March 1994), is a British aristocrat who is a member of the Spencer family.
 He is the fourth child and eldest son of Charles Spencer, 9th Earl Spencer, and his first wife, Victoria Lockwood.
 Nephew of Diana, Princess of Wales, and first cousin to Prince William and Prince Harry, he is the heir apparent to the earldom of Spencer.
The Lady Katya Amelia Spencer (born 10 July 1992) is the third daughter of Charles Spencer, 9th Earl Spencer and his first wife, Victoria Lockwood.
 She is a niece of Diana, Princess of Wales.
 She is the twin of Lady Eliza Spencer.
The Lady Eliza Victoria Spencer (born 10 July 1992) is the second daughter of Charles Spencer, 9th Earl Spencer and his first wife, Victoria Lockwood.
 She is a niece of Diana, Princess of Wales, and a cousin of Prince William, Duke of Cambridge and Prince Harry.
 She and Lady Amelia Spencer are twins.