Peregrine Bertie, 13th Baron Willoughby de Eresby (12 October 1555 – 25 June 1601) was the son of Catherine Willoughby, 12th Baroness Willoughby de Eresby, and Richard Bertie.  Bertie was Lady Willoughby de Eresby's second husband, the first being Charles Brandon, Duke of Suffolk. Peregrine Bertie's half-brothers, Henry and Charles Brandon, died as teenagers four years before his birth. His sister Susan married the Earl of Kent and then the nephew of Bess of Hardwick. Owing to religious politics, the parents had to move outside England and the boy was born at Wesel on the River Rhine.
Born on 12 October 1555, he was baptized at the church of Saint Willibrord in Wesel on 14 October. On Elizabeth I's accession to the throne in 1558, his parents returned to England and applied for a patent of naturalization for him. He formally became English on 2 August 1559. He married Mary de Vere, daughter of John de Vere, 16th Earl of Oxford, between Christmas 1577 and 12 March 1578.  When his mother died in 1580, he succeeded to her barony and he took his seat in the House of Lords on 16 January 1580.
In 1582, he was commissioned to escort the Duke of Anjou from Canterbury to Antwerp. The French royal duke had arrived as a suitor of the un-married Elizabeth. In the same year he was sent to Denmark to invest Frederick II with the Order of the Garter. Lord Willoughby de Eresby arrived at Elsinore on 22 July and left on 27 September 1582. His ulterior purpose was to obtain an understanding whereby English merchant ships would not be molested while in Danish waters. In 1585, he returned to Denmark on behalf of Elizabeth in support of Henry III of Navarre and to obtain Danish help for England's efforts on behalf of the independent Netherlands.
These journeys were made at Bertie's expense as his correspondence with Francis Walsingham made clear; he was becoming desperate to be paid or to escape from the diplomatic duties. After two and a half months of working on the Danish king, Bertie got him to offer to try to persuade the Spanish king to retire from the Low Countries. Frederick also agreed to send 2,000 horse to back up the English force already in the Netherlands. On achieving this much, Peregrine set off for England by way of Hamburg, Emden and Amsterdam. From March 1586 Bertie served in the Netherlands as governor of Bergen-op-Zoom under Robert Dudley, 1st Earl of Leicester,  who was Governor-General of the United Provinces. After Leicester's departure for England in December 1586, he was made general of the English forces. He suffered a major defeat at the Battle of Zutphen but redeemed himself with his victory at the Siege of Bergen. Subsequently, he fought for the Huguenots under Henry of Navarre. He commanded the English contingent at Henry's Siege of Paris in 1590.
Bertie's final appointment was Governor of Berwick upon Tweed on the Scottish border and Warden of the East March in 1598, displacing Robert Carey. At the request of Robert Cecil he organised the kidnapping of Edmund Ashfield, an Englishman visiting James VI of Scotland. Peregrine died on 25 June 1601 at Berwick and was buried at St. James Church, Spilsby, Lincolnshire. 
He had married (and separated from) Mary de Vere, the daughter of John de Vere, 16th Earl of Oxford. They had at least three sons: Robert Bertie, 1st Earl of Lindsey (d. 1642), Sir Peregrine Bertie (d. 1639), and Henry Bertie of Lound (d. 1655). 
It was on Peregrine's estate at Willoughby, Lincolnshire that the parents of John Smith of Jamestown rented a farm which was the site of John's birth.
The military career of Baron Willoughby is celebrated in the popular ballad, "Lord Willoughby's Welcome Home".
Earl of Lindsey is a title in the Peerage of England. It was created in 1626 for the 14th Baron Willoughby de Eresby. He was First Lord of the Admiralty from 1635 to 1636 and also established his claim in right of his mother to the hereditary office of Lord Great Chamberlain of England. Lord Lindsey fought on the Royalist side in the Civil War and was killed at the Battle of Edgehill on 23 October 1642. He was succeeded by his son, the second Earl. He also fought at Edgehill and surrendered to the Parliamentarians in order to attend his mortally wounded father. Lord Lindsey later fought at the First Battle of Newbury, Second Battle of Newbury, and at Naseby. His son from his second marriage, James, was created Earl of Abingdon in 1682. He was succeeded by his son from his first marriage to Martha Cockayne, the third Earl. He represented Boston in the House of Commons and served as Lord Lieutenant of Lincolnshire.
Baron Willoughby de Eresby is a title in the Peerage of England. It was created in 1313 for Robert de Willoughby. Since 1983, the title has been held by Jane Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby.
Robert Bertie, 1st Duke of Ancaster and Kesteven PC, styled17th Baron Willoughby de Eresby between 1666 and 1701, and known as 4th Earl of Lindsey between 1701 and 1706, and as 1st Marquess of Lindsey between 1706 and 1715, was a British statesman and nobleman.
Peregrine Bertie, 2nd Duke of Ancaster and Kesteven, styled The Honourable Peregrine Bertie between 1686 and 1704, Lord Willoughby de Eresby between 1704 and 1715 and Marquess of Lindsey between 1715 and 1723, was a British politician who sat in the House of Commons from 1708 until 1715 when he was called to the House of Lords.
Grimsthorpe Castle is a country house in Lincolnshire, England 4 miles (6.4 km) north-west of Bourne on the A151. It lies within a 3,000 acre (12 km²) park of rolling pastures, lakes, and woodland landscaped by Capability Brown. While Grimsthorpe is not a castle in the strict sense of the word, its character is massive and martial – the towers and outlying pavilions recalling the bastions of a great fortress in classical dress. Grimsthorpe has been the home of the de Eresby family since 1516. The present owner is Jane Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby, granddaughter of Nancy Astor, who died at Grimsthorpe in 1964.
Katherine Brandon, Duchess of Suffolk, suo jure12th Baroness Willoughby de Eresby, was an English noblewoman living at the courts of King Henry VIII, King Edward VI and Queen Elizabeth I. She was the fourth wife of Charles Brandon, 1st Duke of Suffolk, who acted as her legal guardian during his third marriage to Henry VIII's sister Mary. Her second husband was Richard Bertie, a member of her household. Following Charles Brandon's death in 1545, it was rumoured that King Henry had considered marrying Katherine as his seventh wife, while he was still married to his sixth wife, Catherine Parr, who was Katherine's close friend.
General Peregrine Bertie, 3rd Duke of Ancaster and Kesteven, styled Lord Willoughby de Eresby from 1715 to 1723 and Marquess of Lindsey from 1735 to 1742, was the son of Peregrine Bertie, 2nd Duke of Ancaster and Kesteven.
Robert Bertie, 1st Earl of Lindsey KG was an English peer, soldier and courtier.
Montagu Bertie, 2nd Earl of Lindsey, KG, PC was an English soldier, courtier, and politician who sat in the House of Commons between 1624 and 1626. He was created Baron Willoughby de Eresby by writ of acceleration in 1640 and inherited the peerage of Earl of Lindsey in 1642. He fought in the Royalist army in the English Civil War.
Peter Robert Drummond-Burrell, 2nd Baron Gwydyr, 22nd Baron Willoughby de Eresby PC, was a British politician and nobleman.
Robert Bertie, 4th Duke of Ancaster and Kesteven, PC, styled Lord Robert Bertie until 1758 and Marquess of Lindsey between 1758 and 1778, was a British peer. He was born in Grimsthorpe, the second son of the General Peregrine Bertie, 3rd Duke of Ancaster and Kesteven, and Mary Panton
Robert Bertie, 3rd Earl of Lindsey PC FRS, styled Lord Willoughby de Eresby from 1642 to 1666, was an English nobleman.
Brownlow Bertie, 5th Duke of Ancaster PC, styled Lord Brownlow Bertie until 1779, was a British peer and politician who sat in the House of Commons from 1761 to 1779 when he succeeded to a peerage.
Peregrine Bertie may refer to:
Richard Bertie was an English landowner and religious evangelical. He was the second husband of Catherine Willoughby, 12th Baroness Willoughby de Eresby, Duchess Dowager of Suffolk and a woman whom Henry VIII was considering as his seventh wife shortly before his death; she also received a proposal from the King of Poland.
Sir John Wingfield was an English soldier.
Mary de Vere was a 16th-century English noblewoman who lived a life of extraordinary wealth and privilege. The daughter of John de Vere, 16th Earl of Oxford, and his second wife Margery Golding, she married Peregrine Bertie, 13th Baron Willoughby de Eresby. The couple lived with their six children in Grimsthorpe Castle in Lincolnshire. Following Bertie's death, Lady Willoughby married Sir Eustace Hart. She died on about 24 June 1624.
Bertie is a surname. Notable people with the surname include:
Sir Peregrine Bertie was a Jacobean soldier and landowner from Lincolnshire. He represented that county in Parliament in 1614, attended to local land improvements, and took part in several wars on the continent. He and his elder brother Lord Willoughby were frequently at odds with Lord Norreys.
George Cressiac, , was an Albanian Epirote chief and commander in service of the Duke of Parma of Spain during the Anglo-Spanish War. In September 1586, Peregrine Bertie, the 13th Baron Willoughby de Eresby, under Queen Elizabeth, commanding an English army, captured Cressiac after a duel. Cressiac then said in French: "I yield myself to you".