Title: 1346
Content: July 20 &ndash; Margaret, Countess of Pembroke, English princess, daughter of King Edward III of England (d. 1361) ; date unknown &ndash; Eustache Deschamps, French poet (d. 1406) 
Title: Margaret, Countess of Pembroke
Content:  Margaret of England (20 July 1346 &ndash; October/December 1361) was a royal princess born in Windsor, the daughter of King Edward III of England and his consort, Philippa of Hainault. Margaret would be the last princess born to a reigning English monarch for over a century, until the birth of Elizabeth of York in 1466. She was also known as Margaret of Windsor.
Title: Margaret, Countess of Pembroke
Content:  Margaret was the daughter of King Edward III of England and his consort, Philippa of Hainault. She was also known as Margaret of Windsor. Margaret's first marriage prospect was Albert III of Austria but this changed due to politics at the time. A few years later she was affianced to John of Blois, son of Charles of Blois and rival of John V of Brittany to the Breton throne; however, this engagement was abandoned because her sister Mary was already betrothed to John IV of Brittany. Margaret was raised with John Hastings, 2nd Earl of Pembroke, son of Laurence Hastings, 1st Earl of Pembroke and his wife Agnes, the daughter of Roger Mortimer (the favourite of Isabella of France). As children they had a close companionship. On 13 May 1359, she became the wife of John Hastings in the same week as her brother John of Gaunt, 1st Duke of Lancaster married Blanche of Lancaster, in Reading.
Title: Margaret de Quincy, Countess of Lincoln
Content:  not produced issue; although John and Margaret together had two children: She married secondly on 6 January 1242, Walter Marshal, 5th Earl of Pembroke, Lord of Striguil, Lord of Leinster, Earl Marshal of England, one of the ten children of William Marshal, 1st Earl of Pembroke and Isabel de Clare, 4th Countess of Pembroke. This marriage, like those of his four brothers, did not produce any children; therefore when he died at Goodrich Castle on 24 November 1245, Margaret inherited a third of the Earldom of Pembroke as well as the properties and lordship of Kildare. Her dower third outweighed any of the individual holdings of the 13 different co-heirs of the five 
Title: Margaret, Countess of Pembroke
Content:  Two years later, Margaret died, and was buried in Abingdon Abbey. The exact date and cause of her death is unknown; she was last mentioned as living on 1 October 1361.
Title: Countess of Pembroke
Content:  Catherine Woodville (1458-1497), wife of Jasper Tudor, 1st Earl of Pembroke. ; Anne Parr (1515-1552), wife of William Herbert, 1st Earl of Pembroke and sister of Queen consort Catherine Parr. ; Mary Sidney (1561-1621), wife of Henry Herbert, 2nd Earl of Pembroke; one of the first English women to achieve a major reputation for her literary works, translations and literary patronage. ; Mary Talbot (circa 1594-1649), wife of William Herbert, 3rd Earl of Pembroke. ; Elizabeth Spencer (1737-1831), wife of Henry Herbert, 10th Earl of Pembroke daughter of Charles Spencer, 3rd Duke of Marlborough and Elizabeth Trevor. Countess of Pembroke is a title that has been borne by several women throughout history, including: 
Title: Countess of Pembroke
Content: Isabel de Clare, 4th Countess of Pembroke (1172-1220), wife of William Marshal, 1st Earl of Pembroke, and Countess of Pembroke in her own right ; Mary de St Pol, (c.1303–1377), wife of Aymer de Valence, 2nd Earl of Pembroke (c.1275-1324) ; Margaret of England (1346-1361), wife of John Hastings, 2nd Earl of Pembroke; daughter of King Edward III and Philippa of Hainault. ; Anne Manny (1355-1384), 2nd wife to John Hastings, 2nd Earl of Pembroke; daughter of Walter Manny, Baron Manny and Margaret, Duchess of Norfolk. ; Anne Devereux (c.1430–c.1486), wife of William Herbert, 1st Earl of Pembroke. ; Mary Woodville (c.1456-1481), wife of William Herbert, 2nd Earl of Pembroke. Title attained in 1479. 
Title: Princess Margaret, Countess of Snowdon
Content:   Princess Margaret was born on 21 August 1930 at Glamis Castle in Scotland, her mother's ancestral home, and was affectionately known as Margot within the royal family. She was delivered by Sir Henry Simson, the royal obstetrician. The Home Secretary, J. R. Clynes, was present to verify the birth. The registration of her birth was delayed for several days to avoid her being numbered 13 in the parish register. At the time of her birth Margaret was fourth in the line of succession to the British throne. Her father was the Duke of York, the second son of King George V and Queen Mary. Her 
Title: Margaret of Scotland, Countess of Kent
Content:  Margaret of Scotland (1193&ndash;25 November 1259) was a daughter of William the Lion, King of Scotland and his wife Ermengarde de Beaumont. She was a member of the House of Dunkeld and by marriage she was Countess of Kent.
Title: Margaret de Bohun, Countess of Devon
Content:  7 October 1363), married in 1327, her first husband, James Butler, 1st Earl of Ormonde. They were the ancestors of Anne Boleyn and Catherine Parr. Hugh and Margaret had 17 known children, most of whom reached adulthood. Their descendants include members of the British royal family and former British Prime Minister, Sir Winston Churchill. Their family chantry was expanded at Naish Priory in the family's manor of Coker in Somerset, at the end of the 14th century when it was owned by her most notable son, William Courtenay, Archbishop of Canterbury. Margaret died on 16 December 1391 at the age of eighty. She is buried in Exeter Cathedral.

Question: Who is the mother of Margaret, Countess of Pembroke?
Answer: Philippa of Hainault.