Born by 1513, Robert Throckmorton was the eldest son and heir of Sir George Throckmorton (d.1552) by Katherine Vaux, daughter of Nicholas Vaux, 1st Baron Vaux of Harrowden (d.1523). He had several brothers, the most notable being, in descending seniority: Sir Kenelm Throckmorton, Sir Clement Throckmorton MP, Sir Nicholas Throckmorton (1515-1571), Thomas, Sir John Throckmorton (1524-1580), Anthony and George.
Robert Throckmorton may have trained at the Middle Temple, the inn attended by his father. At least three of his younger brothers and his own eldest son studied at Middle Temple, but as the heir to extensive estates he had little need to seek a career at court or in government. He was joined with his father in several stewardships from 1527 and was perhaps the servant of Robert Tyrwhitt, a distant relative by marriage of the Throckmortons, who in 1540 took an inventory of Cromwell's goods at Mortlake. He attended the reception of Anne of Cleves and with several of his brothers served in the French war of 1544. Three years later he was placed on the Warwickshire bench and in 1553 was appointed High Sheriff of Warwickshire. He was also elected as a knight of the shire (MP) for Warwickshire in 1553 and 1555. Three of his brothers also sat for Parliament, Nicholas as knight of the shire for Northamptonshire.
Throckmorton's role in the succession crisis of 1553 is unknown, but his standing with Queen Mary is shown by her reputed answer to the news of Edward VI's death sent her by four of his brothers: ‘If Robert had been there she durst have gaged her life and hazarded the hap’.
In the autumn of 1553, Throckmorton was knighted and appointed constable of Warwick Castle. He continued to sit as MP for the shire until 1558, when he gave way to his eldest son, Thomas.
His Catholicism explains his disappearance from the Commons in the new reign, although the most Catholic of his brothers, Anthony Throckmorton, was to sit in the Parliament of 1563. Judged an ‘adversary of true religion’ in 1564, Throckmorton remained active in Warwickshire until his refusal to subscribe to the Act of Uniformity led to his removal from the commission of the peace.
In 1577, the Bishop of Worcester, John Whitgift, listed Throckmorton as a Catholic and reckoned him to be worth 1,000 marks a year in lands and £1,000 in goods.
Sir Robert Throckmorton's mother was the daughter of Elizabeth FitzHugh, mother of Sir Thomas Parr, by her first marriage to William Parr, 1st Baron Parr of Kendal. This connection made Throckmorton a first cousin to queen consort Catherine Parr and her brother William Parr, 1st Marquess of Northampton.
Throckmorton continued the family in the Catholic tradition. He married his children into the leading Catholic families, and in these generations the increased persecution of the Catholic spawned many relatives who became involved in plots against the throne. The sons of his daughters Anne and Muriel, were Robert Catesby and Francis Tresham of 'Gunpowder Plot' infamy; and a third daughter Mary was married to Edward Arden, who was also convicted of treason and executed for his part in a plot to assassinate Queen Elizabeth in 1583.
Mary kept an excellent record of a woman persecuted for recusancy, documenting the fines and searches made at Coughton Court, that is still in the family archives. A nephew, Francis Throckmorton, was executed in 1584 for acting as a go-between for Mary, Queen of Scots and the Spanish Ambassador in an attempt to invade England and place Mary on the throne. A niece Elizabeth; also known as Bess, the daughter of Sir Nicholas, and lady-in-waiting to Queen Elizabeth, also got into trouble by secretly marrying Sir Walter Raleigh.
Death and Burial
He died on 12 February 1581, six days after making a will in which he styled himself of Weston Underwood, Buckinghamshire but asked to be buried at Coughton, where an alabaster and marble tomb was accordingly erected to his memory: there is a portrait at Coughton Court. He named as executors his eldest son Thomas, and his sons-in-law Sir John Goodwin and Ralph Sheldon, and as overseers another son-in-law Sir Thomas Tresham and his ‘loving friend’ Edmund Plowden. 
Marriages and issue
Throckmorton married firstly, about 1527, Muriel Berkeley (d.1542), the daughter of Thomas Berkeley, 5th Baron Berkeley (1472-1533), by his first wife, Eleanor Constable (c.1485-1527), daughter of Sir Sir Marmaduke Constable, by whom he had a son and four daughters:
- Thomas Throckmorton of Coughton (1534 - 13 March 1615), who married, about 1556, Mary Whorwood (c.1535 - 28 Apr 1607), by whom he had two sons, including John Throckmorton (1580-1614/15), esquire, father of Robert Throckmorton, 1st Baronet (1599-1650), and five daughters.
- Elizabeth Throckmorton (born c. 1535), who married Sir John Goodwin (d.1596/7) of Winchendon, Buckinghamshire.
- Catherine Throckmorton (c.1532 - 12 February 1580), who married firstly Henry Norwood or Northwood (1523?-1556), son of Ralph Norwood (d.1560/1) of Leckhampton, Gloucestershire, and secondly John Williams.
- Mary Throckmorton (d.1603), who married Sir Edward Arden of Park Hall, executed at Smithfield 20 December 1583, by whom she had a son, Robert Arden, and two daughters, Margaret Arden, who married John Somerville, and Catherine Arden, who married Edward Devereux, 1st Baronet Devereux of Castle Bromwich, son of Walter Devereux, 1st Viscount Hereford.
- Anne Throckmorton (1540-1603), who in 1557 married Ralph Sheldon (c.1537-1613) of Beoley.
Throckmorton married secondly, in about 1542, Elizabeth Hussey (c. 1510-23 Jan 1554), widow of Walter Hungerford, 1st Baron Hungerford of Heytesbury (d.1540), by whom she had been notoriously ill-treated, daughter of John Hussey, 1st Baron Hussey of Sleaford (1465-1537) by his second wife, Lady Anne Grey (c. 1490-after. 1537), by whom he had four daughters:
- Muriel Throckmorton (d.1615), who married Sir Thomas Tresham (1543-1605) of Rushton Hall, Northamptonshire, by whom she was the mother of the conspirator, Francis Tresham.
- Anne Throckmorton (d. after 1605), who married Sir William Catesby (1547-1598) of Lapworth, Warwickshire, on 9 June 1566 at Ashby St. Ledgers, Northamptonshire, and had issue including Robert Catesby.
- Elizabeth Throckmorton, who married Sir Anthony Tyringham of Tyringham, Buckinghamshire, by whom she had a daughter, Elizabeth Tyringham, who married Sir Robert Fisher, the first of the Fisher baronets.
- Temperance Throckmorton, who married Sir Randal Brereton (d.1611), by whom she had no issue.
- History of Parliament, The volumes either published or in preparation cover the House of Commons from 1386 to 1868 and the House of Lords from 1660 to 1832.
- Tudor Place[unreliable source], Biography of Sir Robert Throckmorton of Coughton
- G.E.; with Gibbs, Vicary; Doubleday, H.A.; White, Geoffrey H.; Warrand, Duncan; and Walden, Lord Howard de, editors. The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume III, page 13. peerage.com
- Burke's Peerage and Baronetage, 105th edition, London, U.K. Burke's Peerage Ltd, 1970, page 2643. peerage.com
- Wizeman 2004.
- Nicholls 2004.
- Nicholls, Mark (2004). "Tresham, Francis (1567?–1605)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/27708. (Subscription or UK public library membership required.) The first edition of this text is available as an article on Wikisource: "Tresham, Francis". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
- Wizeman, William (2004). "Arden, Edward (1533–1583)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/633. (Subscription or UK public library membership required.) The first edition of this text is available as an article on Wikisource: "Arden, Edward". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
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