Duke of Richmond and Somerset is in Dukedoms of England Alphabetically, Dukedoms of England Chronologically, Extinct Dukedoms of England.
Summary
18th June 1525. Henry Fitzroy 1st Duke Richmond and Somerset [aged 6] created. See Knighting of Henry Fitzroy.
22nd July 1536. King Henry VIII of England and Ireland [aged 45] extinct.
On 18th June 1525 Henry Fitzroy [aged 6] was taken by barge to Bridewell Palace [Map] where he was enobled by his father King Henry VIII of England and Ireland [aged 33].
In the morning Henry Fitzroy was created 1st Earl Nottingham.
In the afternoon Henry Fitzroy was created 1st Duke of Richmond and Somerset.
Henry Percy 5th Earl of Northumberland [aged 47] carried the Sword of State. Thomas More [aged 47] read the patents of nobility. Charles Brandon 1st Duke of Suffolk [aged 41], Thomas Grey 2nd Marquess Dorset [aged 47],
Henry Courtenay [aged 29] was created 1st Marquess Exeter. Gertrude Blount Marchioness of Exeter [aged 22] by marriage Marchioness Exeter.
Henry Clifford [aged 32] was created 1st Earl of Cumberland, Warden of the West Marches and Governor of Carlisle Castle.
Thomas Manners [aged 33] was created 1st Earl of Rutland. Eleanor Paston Countess Rutland [aged 30] by marriage Countess of Rutland. He was given the Earldom of Rutland to reflect his descent from Anne York Duchess Exeter sister of the previous Earl of Rutland. At the same time his arms 
Manners Arms were augmented with the 
Manners Augmented Arms
Henry Brandon [aged 2] was created 1st Earl Lincoln.
Robert Radclyffe [aged 42] was created 1st Viscount Fitzwalter.
Thomas Boleyn 1st Earl Wiltshire and Ormonde [aged 48] was created 1st Viscount Rochford. Elizabeth Howard Countess of Wiltshire and Ormonde [aged 45] by marriage Viscountess Rochford.
Thomas Howard 3rd Duke of Norfolk [aged 52], William Fitzalan 11th or 18th Earl of Arundel [aged 49] and John de Vere 14th Earl of Oxford [aged 25] attended.
On 28th November 1533 Henry Fitzroy 1st Duke Richmond and Somerset [aged 14] and Mary Howard Duchess Richmond and Somerset [aged 14] were married. She by marriage Duchess of Richmond and Somerset. Another coup for the Howard Family especially in view of Henry Fitzroy being considered by some as a possible heir in view of Anne Boleyn having given birth to a girl. She the daughter of Thomas Howard 3rd Duke of Norfolk [aged 60] and Elizabeth Stafford Duchess Norfolk [aged 36]. He the illegitmate son of King Henry VIII of England and Ireland [aged 42] and Elizabeth "Bessie" Blount Baroness Clinton and Tailboys [aged 35]. They were third cousins.
On 22nd July 1536 or 23rd July 1536 Henry Fitzroy 1st Duke Richmond and Somerset [aged 17] died at St James's Palace [Map]. He the illegitimate son of King Henry VIII of England and Ireland [aged 45]. He was buried at Church of St Michael the Archangel, Framlingham [Map]. Duke of Richmond and Somerset, Earl Nottingham extinct.