Guilford Dudley (1536 - 12 February 1554) was a son of John Dudley, Duke of Northumberland, and Jane Guilford; and the younger brother of Robert Dudley, the future earl of Leicester. The unusual first name derives from his mother's family name. Events February 2 - Spaniard Pedro de Mendoza founds Buenos Aires, Argentina. ... February 12 is the 43rd day of the year in the Gregorian Calendar. ... Events February 12 - After claiming the throne of England the previous year, Lady Jane Grey is beheaded for treason alongside her husband. ... John Dudley (1501-1553) was a Tudor nobleman and politician, executed for high treason by Queen Mary I of England. ... Robert Dudley, Earl of Leicester (also referred to as Lord Leycester such as at the Lord Leycester Hospital. ...

His father was Regent of the kingdom after the execution of Lord Protector Edward Seymour, first Duke of Somerset, during the reign of King Edward VI of England. On Edward's death, Northumberland feared the accession of the King's half-sister, the Catholic Lady Mary (future Mary I of England). The Duke of Northumberland had the order of succession changed, so Lady Jane Grey would be proclaimed Queen after the death of the King. The Lord Protector of the Commonwealth of England, Scotland and Ireland was the title of the head of state during part of the Commonwealth period. ... This may refer to: Edward Seymour, 1st Duke of Somerset, an English statesman of the Tudor era (16th century) Edward Seymour (Treasurer of the Navy), A 17th century English statesman who served as Treasurer of the Navy during the First Danby Ministry Sir Edward Hobart Seymour, British admiral active during... The Duke of Somerset is a title in the peerage of England that has been created several times. ... Edward Tudor redirects here; for another (though unlikely) Edward Tudor, see a putative younger son of Henry VII of England, who, if existed, would be the uncle of this Edward Edward VI (12 October 1537–6 July 1553) was King of England and King of Ireland from 28 January 1547... Mary I (18 February 1516 – 17 November 1558), also known as Mary Tudor, was Queen of England and Queen of Ireland from 6 July 1553 (de jure) or 19 July 1553 (de facto) until her death. ... Lady Jane Grey (October 12?, 1537–February 12, 1554), was a great granddaughter of Henry VII of England, and was proclaimed Queen of England for nine days in 1553. ...

In order to ensure the security of the kingdom against Catholic rule, he had married Lady Jane to his son Guilford on May 15, 1553. May 15 is the 135th day of the year in the Gregorian Calendar (136th in leap years). ... // Events June 26 - Christs Hospital in London gets a Royal Charter July 6 - Edward VI of England dies July 10 - Lady Jane Grey is proclaimed Queen of England - for the next nine days July 18 - Lord Mayor of London proclaims Queen Mary as the rightful Queen - Lady Jane Grey...

Within days of king Edward's untimely death, Jane was hastily proclaimed queen, and against her own better judgement officially ruled for nine (or thirteen) days. However, after continued unrest in the Country, Jane was deposed by Henry Grey, Duke of Suffolk who pronounced Mary Queen of England. Jane and Guilford were moved from the Royal apartments to the Gentleman Gaoler's lodgings. Mary agreed to spare their lives, and for a year they lived in the Tower, with substantial freedom. The title of Earl of Suffolk has been created several times in the Peerage of England, most recently in 1603 for Thomas Howard, 1st Baron Howard of Walden. ...

Guilford was escorted by guards to Tower Hill, where he was publically executed. His body was carried to the chapel of St Peter ad Vincula, in the grounds of the Tower of London. On seeing the body from her window, Jane is alleged to have cried, "Oh Guilford, Guilford." He was buried in the chapel with Jane.

Guilford's unfortunate brothers, John, Ambrose, Robert and Henry, along with their mother, were also for a while incarcerated in the Tower, but were subsequently pardoned. John Dudley, 2nd Earl of Warwick (~1528 - October 18, 1554) was the heir of John Dudley, 1st Duke of Northumberland. ... Arms of Ambrose Dudley Ambrose Dudley, 3rd Earl of Warwick (died February 21, 1589), was the son of John Dudley, 1st Duke of Northumberland and a brother of Robert Dudley, Earl of Leicester. ... Robert Dudley, by Nicholas Hilliard, 1576. ...

A cell wall in the Tower of London contains a carving of the word "IANE." (The letter "J" did not come into common use until the 18th century and was frequently signified by an "I" before this.) The carving is believed to have been done by Guilford while imprisoned, perhaps pining for his wife, or his mother (also called Jane).