Question: When did John Beaufort, Marquess Of Dorset's father die?

Knowledge 1: John Beaufort, Marquess of Dorset
John Beaufort, Marquess of Dorset, Earl of Dorset (b. 1441 – d. 4 May 1471) was a scion of the Beaufort family, who fought for the Lancastrians in the Wars of the Roses.He was the third son of Edmund Beaufort, 2nd Duke of Somerset and his wife, Lady Eleanor Beauchamp, daughter of Richard de Beauchamp, Earl of Warwick.When his eldest brother, Henry Beaufort, 3rd Duke of Somerset, was killed fighting for Lancaster in 1464 at the Battle of Hexham, the next brother, Edmund, succeeded to the Dukedom, and John became "Marquess of Dorset" and "Earl of Dorset", courtesy titles granted to the Beaufort heir-apparent or heir-presumptive.These titles were not recognized by King Edward IV, of the House of York.John had been in exile since 1461, first in Burgundyand then France.When Henry VI of Lancaster reclaimed the throne in October 1470, John returned with his brother Edmund.But a few months later, Henry was driven from the throne again, and the Lancastrians were on the run.John was killed in the Battle of Tewkesbury on 4 May 1471, while fighting beside Edmund, who was captured and beheaded two days later.John left behind no issue and was never married.With the death of John and Edmund, the legitimate male line of the Beauforts ended. [SEP] Knowledge 2: Edmund Beaufort, 2nd Duke of Somerset
Edmund Beaufort, 2nd Duke of Somerset, KG (22 May 1455), was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War.He also succeeded in the title of 4th Earl of Somerset and was created 1st Earl of Dorset and1st Marquess of Dorset (previously held by his father and later forfeited), and Count of Mortain.He was known for his deadly rivalry with Richard of York, 3rd Duke of York.
Knowledge 1: John Beaufort, Marquess of Dorset
John Beaufort, Marquess of Dorset, Earl of Dorset (b. 1441 – d. 4 May 1471) was a scion of the Beaufort family, who fought for the Lancastrians in the Wars of the Roses.He was the third son of Edmund Beaufort, 2nd Duke of Somerset and his wife, Lady Eleanor Beauchamp, daughter of Richard de Beauchamp, Earl of Warwick.When his eldest brother, Henry Beaufort, 3rd Duke of Somerset, was killed fighting for Lancaster in 1464 at the Battle of Hexham, the next brother, Edmund, succeeded to the Dukedom, and John became "Marquess of Dorset" and "Earl of Dorset", courtesy titles granted to the Beaufort heir-apparent or heir-presumptive.These titles were not recognized by King Edward IV, of the House of York.John had been in exile since 1461, first in Burgundyand then France.When Henry VI of Lancaster reclaimed the throne in October 1470, John returned with his brother Edmund.But a few months later, Henry was driven from the throne again, and the Lancastrians were on the run.John was killed in the Battle of Tewkesbury on 4 May 1471, while fighting beside Edmund, who was captured and beheaded two days later.John left behind no issue and was never married.With the death of John and Edmund, the legitimate male line of the Beauforts ended. [SEP] Knowledge 2: Theodred II (Bishop of Elmham)
Theodred II was a medieval Bishop of Elmham.The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997.
Knowledge 1: John Beaufort, Marquess of Dorset
John Beaufort, Marquess of Dorset, Earl of Dorset (b. 1441 – d. 4 May 1471) was a scion of the Beaufort family, who fought for the Lancastrians in the Wars of the Roses.He was the third son of Edmund Beaufort, 2nd Duke of Somerset and his wife, Lady Eleanor Beauchamp, daughter of Richard de Beauchamp, Earl of Warwick.When his eldest brother, Henry Beaufort, 3rd Duke of Somerset, was killed fighting for Lancaster in 1464 at the Battle of Hexham, the next brother, Edmund, succeeded to the Dukedom, and John became "Marquess of Dorset" and "Earl of Dorset", courtesy titles granted to the Beaufort heir-apparent or heir-presumptive.These titles were not recognized by King Edward IV, of the House of York.John had been in exile since 1461, first in Burgundyand then France.When Henry VI of Lancaster reclaimed the throne in October 1470, John returned with his brother Edmund.But a few months later, Henry was driven from the throne again, and the Lancastrians were on the run.John was killed in the Battle of Tewkesbury on 4 May 1471, while fighting beside Edmund, who was captured and beheaded two days later.John left behind no issue and was never married.With the death of John and Edmund, the legitimate male line of the Beauforts ended. [SEP] Knowledge 2: Bill Smith (footballer, born 1897)
William Thomas Smith( born 9 April 1897, date of death unknown) was an English professional footballer.

Answer: 22 May 1455