Katherine de Stafford
Katherine de Stafford, Countess of Suffolk (born around 1376 – 8 April 1419) was a daughter of Hugh de Stafford, 2nd Earl of Stafford and his wife Philippa de Beauchamp.
By her marriage to Michael de la Pole, 2nd Earl of Suffolk, she became known as the Countess of Suffolk.
Philippa de Beauchamp
Philippa de Beauchamp( before 1344- 6 April 1386) was the daughter of Thomas de Beauchamp, 11th Earl of Warwick and Katherine Mortimer.
On or before 1 March 1350 she married Hugh de Stafford, 2nd Earl of Stafford, son of Ralph de Stafford, 1st Earl of Stafford and Margaret Audley, Baroness Audley.
Philippa and Hugh had seven children.
Katherine Hoskins
Katherine de Montalant Hoskins( May 25, 1909 – May 26, 1988) was an American poet, short story writer, and playwright.
John Sutton IV
Sir John de Sutton IV( 6 December 1361 – 10 March 1396) is the 3rd Baron Sutton of Dudley, and heir of Dudley Castle.
He was the son of Sir John de Sutton III, 2nd Lord of Dudley, and Katherine de Stafford, youngest daughter of Ralph de Stafford, 1st Earl of Stafford.
At the time of his father's death, John IV was a minor whose wardship and marriage was granted to Richard FitzAlan, 11th Earl of Arundel.
During the fifth year of Richard II of England, 350 marks was paid to Sir Philip le Spencer, to be a guardian over John IV with the arrangement of marriage to his daughter, Alice.
She died in 1392 without issue.
John married secondly to an unknown Joan( d. April 1408), by whom Sir John de Sutton V succeeded as heir.
Hugh Stafford, 2nd Earl of Stafford
Hugh de Stafford, 2nd Earl of Stafford, KG (c. 1342 – 16 October 1386) was an English nobleman.
John Sutton III
Sir John de Sutton III( 1339 – c. 1370) was the 2nd Baron Sutton of Dudley and heir of Dudley Castle.
He was the son of Sir John de Sutton II, the first Lord of Dudley, and Isabella de Cherleton.
John III married twice, with the first on 25 December 1357 to Katherine de Stafford( 1340/ 8 – December 1361), daughter of Ralph de Stafford, 1st Earl of Stafford and Margaret de Audley, 2nd Baroness Audley.
After 1361, he married secondly to Joan, daughter of Sir John de Clinton of Coleshill.
By Katherine, Sir John de Sutton IV became successor.
Edmund Stafford, 1st Baron Stafford
Edmund de Stafford, 1st Baron Stafford was the son of Nicholas de Stafford, who was summoned to parliament by writ on 6 February 1299 by King Edward I.
Katherine de la Pole
Katherine de la Pole (1410/11 – 1473) was the oldest daughter of Michael de la Pole, 2nd Earl of Suffolk and Katherine de Stafford.
She became abbess of Barking Abbey in January 1433.
In this capacity, between 1437 and 1440, she took care of Edmund and Jasper Tudor, the two eldest sons of Catherine of Valois (widowed queen of King Henry V of England) by her second husband Owen Tudor.
Katherine persuaded King Henry VI to take an interest in the boys, who were his half-brothers.
Henry later ennobled them, thereby taking one of the important steps that would later enable Edmund's son Henry Tudor to claim the English throne.
Edmund's wife Lady Margaret Beaufort, mother of Henry Tudor, had been a ward of Katherine's brother, William de la Pole, steward of the royal household.
Ralph Stafford, 1st Earl of Stafford
Ralph de Stafford, 2nd Baron Stafford, 1st Earl of Stafford, KG( 24 September 1301 – 31 August 1372) was an English nobleman and notable soldier during the Hundred Years War against France.
Robert de Stafford
Robert de Stafford( known also as Robert of Tosny and Robert de Toeni)( 1039 – c. 1100) was a Norman nobleman, the builder of Stafford Castle in England.
He is generally said to have been a son of Roger I of Tosny; primary evidence is lacking to determine his parentage, according to Cawley.
Cawley notes that Robert de Stafford is connected to the Tosny family through a charter( not dated) under which" Robertus de Stafford" confirmed donations to Wotton Wawen Abbey, Warwickshire by" avus meus Robertus de Toenio et pater meus Nicolaus de Stafford."
Also" Robertus de Staffordia et Robertus filius meus et hæres" confirmed donations of property to Evesham Monastery by" Rodbertus avus meus ... et pater meus Nicholaus" by undated charter.
He held a large number of lordships in the Domesday Survey, a high proportion lying in Staffordshire.
They included Barlaston and Bradley in Staffordshire and part of Duns Tew in Oxfordshire.
Robert de Stafford was buried in Evesham Abbey.

Question: What nationality is Katherine De Stafford's father?
Answer: English