Question: Which poem by William Shakespeare published in 1593, one of his earliest works, was dedicated to  3rd Earl of Southampton?

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Earl of Ruglen: Earl of Ruglen was a title in the Peerage of Scotland.  Along with the subsidiary titles Viscount of Riccartoun and Lord Hillhouse, it was created on the 14th of April, 1697, for Lord John Douglas-Hamilton, fourth (third surviving) son of William Douglas-Hamilton, Duke of Hamilton, 1st Earl of Selkirk, and his wife Anne Hamilton, 3rd Duchess of Hamilton.  The 1st Earl of Ruglen succeeded as 3rd Earl of Selkirk on the death of his elder brother in 1739.  The Earl's only son William, Lord Daer, died in 1742, so on the death of the Earl of Selkirk and Ruglen in 1744, the Earldom of Selkirk passed to his great-nephew, while the Earldom of Ruglen passed to his daughter, Anne, who had married William Douglas, 2nd Earl of March.  On her death in 1748, the Earldom of Ruglen passed to her only child William, 3rd Earl of March.  He succeeded his first cousin once removed Charles Douglas as 5th Marquess and 4th Duke of Queensberry in 1778.

William Herbert, 3rd Earl of Pembroke: William Herbert, 3rd Earl of Pembroke (8 April 1580 – 10 April 1630) was an English nobleman, politician, and courtier.  He was the son of Henry Herbert, 2nd Earl of Pembroke and his third wife Mary Sidney.  Chancellor of the University of Oxford, he founded Pembroke College, Oxford with King James.  He was warden of the Forest of Dean, and constable of St Briavels from 1608 to 1630.  He served as Lord Chamberlain from 1615 to 1625.  In 1623, the First Folio of William Shakespeare's plays was dedicated to him, together with his brother, Philip Herbert, 1st Earl of Montgomery.

Mary Wriothesley, Countess of Southampton: Mary Wriothesley, Countess of Southampton (22 July 1552 – October/November 1607), previously Mary Browne, became the wife of Henry Wriothesley, 2nd Earl of Southampton, at the age of thirteen and the mother of Henry Wriothesley, 3rd Earl of Southampton.  Widowed in 1581, she was Dowager Countess of Southampton until 1595, when for a few months until his death she was married to the courtier Sir Thomas Heneage, becoming Lady Heneage.  In 1598 she married lastly Sir William Hervey, so was known as Lady Hervey until her death.

Henry Wriothesley, 3rd Earl of Southampton: Henry Wriothesley, 3rd Earl of Southampton {'1': ", '2': ", '3': ", '4': "} (6 October 1573 – 10 November 1624), (pronunciation uncertain: "Rezley", "Rizely" (archaic), (present-day) and have been suggested), was the only son of Henry Wriothesley, 2nd Earl of Southampton, and Mary Browne, daughter of Anthony Browne, 1st Viscount Montagu.  Shakespeare's two narrative poems, "Venus and Adonis" and "The Rape of Lucrece", were dedicated to Southampton, who is generally identified as the Fair Youth of Shakespeare's Sonnets.

Venus and Adonis (Shakespeare poem): Venus and Adonis is a narrative poem by William Shakespeare published in 1593.  It is probably Shakespeare's first publication.

William d'Aubigny, 4th Earl of Arundel: William d'Aubigny, 4th Earl of Arundel, also known as William de Albini V (b. 1203 – before 7 August 1224) was the eldest son of William d'Aubigny, 3rd Earl of Arundel and Mabel of Chester (born c. 1173), daughter of Hugh de Kevelioc, 3rd Earl of Chester and Bertrade de Montfort of Évreux.  He became Earl of Arundel and Earl of Sussex on 30 March 1221.  He was buried at Wymondham Abbey, Norfolk.  There is no evidence that he married or had children.  He was the Chief Butler of England and was succeeded by his brother, Hugh.

Richard Boyle, 3rd Earl of Burlington: Richard Boyle, 3rd Earl of Burlington and 4th Earl of Cork, {'1': ", '2': ", '3': ", '4': "} (25 April 169415 December 1753) was an Anglo-Irish architect and noble often called the "Apollo of the Arts" and the "Architect Earl".  The son of the 2nd Earl of Burlington and 3rd Earl of Cork, Burlington never took more than a passing interest in politics despite his position as a Privy Counsellor and a member of both the British House of Lords and the Irish House of Lords.

Charles Stanhope, 3rd Earl Stanhope: Charles Stanhope, 3rd Earl Stanhope aka Charles Mahon, 3rd Earl Stanhope FRS (3 August 1753 – 15 December 1816) was a British statesman and scientist.  He was the father of the great traveller and Arabist Lady Hester Stanhope and brother-in-law of William Pitt the Younger.  He is sometimes confused with an exact contemporary of his, Charles Stanhope, 3rd Earl of Harrington.  His lean and awkward figure was extensively caricatured by James Sayers and James Gillray, reflecting his political opinions and his relationship with his children.

Earl of Thanet: Earl of the Isle of Thanet, in practice shortened to Earl of Thanet, was a title in the Peerage of England.  It was created in 1628 for Nicholas Tufton, 1st Baron Tufton.  He had already succeeded as second Baronet of Hothfield in 1631 and been created Baron Tufton, of Tufton in the County of Sussex, in 1626, also in the Peerage of England.  The Baronetcy, of Hothfield in the County of Kent, was created in the Baronetage of England in 1611 for his father, John Tufton.  Lord Thanet was succeeded by his son, the second Earl.  He married Lady Margaret Sackville, daughter of Richard Sackville, 3rd Earl of Dorset and Lady Anne Clifford.  Their son, the third Earl, successfully claimed the barony of de Clifford through his maternal grandmother Lady Anne (which had been in abeyance since the death of his great-grandfather George Clifford, 3rd Earl of Cumberland).

The Rape of Lucrece: The Rape of Lucrece (1594) is a narrative poem by William Shakespeare about the legendary Lucretia.  In his previous narrative poem, "Venus and Adonis" (1593), Shakespeare had included a dedicatory letter to his patron, the Earl of Southampton, in which he promised to write a "graver work".  Accordingly, "The Rape of Lucrece" has a serious tone throughout.

Supporting paragraphs: Henry Wriothesley, 3rd Earl of Southampton Venus and Adonis (Shakespeare poem)
Answer: Venus and Adonis