Henry Jermyn, 3rd Baron Jermyn and 1st Baron Dover, 1st Jacobite Earl of Dover PC (c. 1636–1708) was an English peer and supporter of James II.
Jermyn was the second son of Thomas Jermyn, of Rushbrooke, Suffolk, who died in 1659, and his wife Rebecca Rodway, who married secondly Henry Brouncker, 3rd Viscount Brouncker. He surpassed his uncle, Lord St Albans, in reputation for profligacy, figuring frequently as "the little Jermyn" in the Grammont Memoirs, as the lover of Lady Castlemaine, Lady Shrewsbury, Miss Jennings and other beauties of the court of Charles II of England. 
According to rumour, his most notable conquest was Charles's widowed sister Mary of Orange, whom he met several times during her brother's exile, and there were even stories that they were secretly married. Historians generally discount these rumours, but Charles II took them seriously, and reprimanded his sister for her lack of discretion, but with no effect: Mary sharply reminded her brother that his own love affairs hardly entitled him to judge her moral conduct. Charles was especially angry because of the similar rumours that Jermyn's uncle Lord St Albans had secretly married the Queen Dowager Henrietta Maria. As John Phillipps Kenyon remarked, to have one Jermyn as an in-law would have been bad enough; to have two would be intolerable.
He was a noted duelist and a lifelong gambler. In a notorious duel with Colonel Thomas Howard, (younger brother of Charles Howard, 1st Earl of Carlisle), in August 1662, which Samuel Pepys refers to in his Diary, Jermyn was left for dead. He recovered, but his second Giles Rawlings was killed by Howard's second Colonel Carey Dillon, later the 5th Earl of Roscommon: the cause is said to have been the rivalry between Jermyn and Howard for the affections of Lady Shrewsbury, who was notorious for the number of her lovers.
While the court was in exile, he obtained a post in the household of the Duke of York,  despite the strong disapproval of Charles II, and he became James's master of the horse at the English Restoration, and rode a horse at the Coronation of Charles II. Having previously offended the king by courting his sister Mary, he proceeded to give further offence by having an affair with Lady Castlemaine, by then the chief royal mistress, and he was banished from court for six months.
Being a Roman Catholic, he enjoyed a position of influence with James, who on his accession raised Jermyn to the Peerage of England in 1685 as Baron Dover in the county of Kent, and appointed him Lieutenant-General of the Royal Guard in 1686.  He was one of the first Catholics to be admitted to the Privy Council of England. Despite his debauched private life, as a politician, he was a moderate and sensible influence on the king. While his loyalty was never in question, he was not afraid to speak his mind to James, or to disagree with him in public.
At the Glorious Revolution, Dover adhered to James, whom he followed abroad, and in July 1689 the deposed sovereign created him Baron Jermyn of Royston, Baron Ipswich, Viscount Cheveley and Earl of Dover in the Jacobite Peerage, these titles not being recognised by the English Government, though Dover became generally known as the Earl of Dover. He commanded a troop at the Battle of the Boyne, but shortly afterwards made his submission to King William III. He spent the rest of his life living quietly at his London townhouse, or at his country estate Cheveley, near Newmarket. He succeeded his brother Thomas as 3rd Baron Jermyn in 1703, and died in 1708. As he left no children by his wife, Judith, daughter of Sir Edmund Poley, of Badley, Suffolk, his titles became extinct at his death.  His estates were inherited by his niece, Hon. Merolina Jermyn, wife of Sir Thomas Spring, 3rd Baronet.
Charles Talbot, Duke of Shrewsbury, KG, PC was an English politician who was part of the Immortal Seven group that invited Prince William III of Orange to depose King James II of England during the Glorious Revolution. He was appointed to several minor roles before the revolution, but came to prominence as a member of William's government. Born to Roman Catholic parents, he remained in that faith until 1679 when—during the time of the Popish Plot and following the advice of the divine John Tillotson—he converted to the Church of England. Shrewsbury took his seat in the House of Lords in 1680 and three years later was appointed Gentleman-Extraordinary of the Bedchamber, suggesting he was in favour at the court of Charles II.
Charles Howard, 1st Earl of Carlisle was an English military leader and politician who sat in the House of Commons at various times between 1653 and 1660 and was created Earl of Carlisle in 1661.
Barbara Palmer, 1st Duchess of Cleveland, Countess of Castlemaine, was an English royal mistress of the Villiers family and perhaps the most notorious of the many mistresses of King Charles II of England, by whom she had five children, all of them acknowledged and subsequently ennobled. Barbara was the subject of many portraits, in particular by court painter Sir Peter Lely.
Charlotte Lee, Countess of Lichfield, formerly Lady Charlotte Fitzroy, was the illegitimate daughter of King Charles II of England by one of his best known mistresses, Barbara Villiers, 1st Duchess of Cleveland. Known for her beauty, Charlotte was married at age 12 to her husband, Edward Henry Lee, 1st Earl of Lichfield, with whom she had a large family.
Roger Palmer, 1st Earl of Castlemaine, PC (1634–1705) was an English courtier, diplomat, and briefly a member of parliament, sitting in the House of Commons of England for part of 1660. He was also a noted Roman Catholic writer. His wife Barbara Villiers was one of Charles II's mistresses.
Sir Heneage Finch, 3rd Earl of Winchilsea of Eastwell, Kent, was the 3rd Earl of Winchilsea.
Charles Beauclerk, 1st Duke of St Albans, KG was an illegitimate son of King Charles II of England by his mistress Nell Gwyn.
Henry Jermyn, 1st Earl of Saint Albans, was an English politician and courtier. He sat in the House of Commons at various times between 1625 and 1643 when he was raised to the peerage as Baron Jermyn. He was one of the most influential courtiers of the period, constantly devising and promoting schemes to involve foreign powers in the restoration of the monarchy, both before and after the execution of Charles I.
The title Earl of Dover has been created twice, once in the Peerage of England and once in the Jacobite Peerage.
William Herbert, 1st Marquess of Powis, PC KG (1626 – 2 June 1696) was an English nobleman, best remembered for his suffering during the Popish Plot. He succeeded his father as 3rd Baron Powis in 1667 and was created Earl of Powis in 1674 by King Charles II and Viscount Montgomery, of the Town of Montgomery, and Marquess of Powis in 1687 by King James II, having been appointed to the Privy Council in 1686.
Mary "Moll" Davis, also spelt Davies or Davys, was a courtesan and mistress of King Charles II of England. She was an actress and entertainer before and during her role as royal mistress.
Elizabeth Stanhope, Countess of Chesterfield was an Irish-born beauty. She was a courtier after the Restoration at the court of Charles II of England at Whitehall. She was the second wife of Philip Stanhope, 2nd Earl of Chesterfield.
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Henry Brouncker, 3rd Viscount Brouncker was a Restoration-era medical doctor, courtier, politician, and civil servant. He served as Cofferer of the Household to Charles II, and served as Gentleman of the Bedchamber to James, Duke of York. He was a member of parliament and a very skilled games player.
Baron Jermyn, of St Edmundsbury, was a title in the Peerage of England.
Anna Maria Talbot, Countess of Shrewsbury was Countess of Shrewsbury from 1659 to 1668, by virtue of her marriage to Francis Talbot, 11th Earl of Shrewsbury.
Thomas Jermyn, 2nd Baron Jermyn was an English politician who sat in the House of Commons from 1679 until he inherited a peerage in 1684.
Elizabeth, comtesse de Gramont, was an Irish-born courtier, first after the Restoration at the court of Charles II of England in Whitehall and later, after her marriage to Philibert de Gramont, at the court of Louis XIV where she was a lady-in-waiting to the French queen, Maria Theresa of Spain.
Sir Jermyn Davers, 4th Baronet, of Rougham and Rushbrooke, Suffolk, was an English landowner and Tory politician who sat in the House of Commons from 1722 to 1743.
Carey or Cary Dillon, 5th Earl of Roscommon, PC (Ire) (1627–1689) was an Irish nobleman and professional soldier of the seventeenth century. He held several court offices under King Charles II and his successor King James II. After the Glorious Revolution he joined the Williamite opposition to James and was in consequence attainted as a traitor by James II's Irish Parliament in 1689. In that year he fought at the Siege of Carrickfergus shortly before his death in November of that year.
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