Sir William de la Pole was an English lord, and Knight

Knight

A knight was a member of a class of lower nobility in the High Middle Ages.By the Late Middle Ages, the rank had become associated with the ideals of chivalry, a code of conduct for the perfect courtly Christian warrior....

 of Wingfield Castle

Wingfield Castle

Wingfield Castle, Wingfield, Suffolk, England was the ancestral home of the Wingfield family and their heirs, the De La Poles, Earls and Dukes of Suffolk, but is now a private house....

 in Wingfield

Wingfield

Wingfield could be:People* Sir Charles John Wingfield, MP* Edward Maria Wingfield, first President of the Jamestown colony, Virginia, US* Sir John de Wingfield, aide to Edward the Black Prince* Peter Wingfield, an actor famous as Methos...

, Suffolk

Suffolk

Suffolk is a non-metropolitan county of historic origin in East Anglia, England. It has borders with Norfolk to the north, Cambridgeshire to the west and Essex to the south. The North Sea lies to the east...

. He was the son of John de la Pole, 2nd Duke of Suffolk

John de la Pole, 2nd Duke of Suffolk

John de la Pole, 2nd Duke of Suffolk, KG , known as "the Trimming Duke". He was the son of William de la Pole, 1st Duke of Suffolk and Alice Chaucer, daughter of Thomas Chaucer.-Life:...

 (1442 - 1492) and Elizabeth Plantagenet

Elizabeth of York, Duchess of Suffolk

Elizabeth of York, Duchess of Suffolk was the sixth child and third daughter of Richard Plantagenet, 3rd Duke of York and Cecily Neville....

 (Elizabeth of York, Duchess of Suffolk) (1444 - 1504).

Around 1497, he married Catherine Stourton, daughter of William Stourton, 2nd Baron Stourton

William Stourton, 2nd Baron Stourton

William Stourton, 2nd Baron Stourton was the son of John Stourton and Marjory Wadham.He succeeded to his father's title in 1462.The second Baron had at least three sons:*John, became Baron in 1479.*William, became Baron in 1487....

 and Margaret Chidiocke, but they had no issue.

He was brother to Richard de la Pole

Richard de la Pole

Richard de la Pole was a pretender to the English crown. Commonly nicknamed White Rose, he was the last member of the House of York to actively and openly seek the crown of England...

, John de la Pole, 1st Earl of Lincoln

John de la Pole, 1st Earl of Lincoln

John de la Pole, 1st Earl of Lincoln was the eldest son of John de la Pole, 2nd Duke of Suffolk and Elizabeth of York, Duchess of Suffolk. His mother was the sixth child and third daughter born to Richard Plantagenet, 3rd Duke of York and Cecily Neville...

, and Edmund de la Pole, 3rd Duke of Suffolk

Edmund de la Pole, 3rd Duke of Suffolk

Edmund de la Pole, 3rd Duke of Suffolk, 6th Earl of Suffolk , Duke of Suffolk, was a son of John de la Pole, 2nd Duke of Suffolk and his wife Elizabeth of York.-Family:...

.

He was held prisoner in Tower of London

Tower of London

Her Majesty's Royal Palace and Fortress, more commonly known as the Tower of London, is a historic castle on the north bank of the River Thames in central London, England. It lies within the London Borough of Tower Hamlets, separated from the eastern edge of the City of London by the open space...

 longer than anyone else in history. For 37 years he was held for allegedly plotting against King Henry VII.