Geoffrey de Mandeville, 2nd Earl of Essex
Geoffrey de Mandeville, 2nd Earl of Essex( d 1166) was an English nobleman, the second son of Geoffrey de Mandeville, 1st Earl of Essex and Rohese de Vere, Countess of Essex.
Henry Bourchier, 1st Earl of Essex
Henry Bourchier, 5th Baron Bourchier, 2nd Count of Eu, 1st Viscount Bourchier, 1st Earl of Essex, KG (c. 1404/
c. 1406 – 4 April 1483), was the eldest son of William Bourchier, 1st Count of Eu and Anne of Gloucester.
On his mother's side, he was a great-grandson of Edward III of England.
Humphrey de Bohun, 2nd Earl of Hereford
Humphrey( IV) de Bohun( 1204 – 24 September 1275) was 2nd Earl of Hereford and 1st Earl of Essex, as well as Constable of England.
He was the son of Henry de Bohun, 1st Earl of Hereford, and Maud FitzGeoffrey.
Anne of Gloucester
Anne of Gloucester, Countess of Stafford (30 April 1383 – 16 October 1438) was the eldest daughter of Thomas of Woodstock, Duke of Gloucester, and Eleanor de Bohun.
Margaret de Stafford
Margaret Stafford( born c. 1364; died 9 June 1396) was the daughter of Hugh de Stafford, 2nd Earl of Stafford, and Philippa de Beauchamp.
She was the first wife of Ralph Neville, 1st Earl of Westmorland, and the grandmother of the 2nd Earl.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Henry Percy, 1st Earl of Northumberland
Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal( 10 November 134120 February 1408) was the son of Henry de Percy, 3rd Baron Percy, and a descendant of Henry III of England.
His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and Lancaster, who was the son of Henry III.
John Bourchier, 1st Earl of Bath
John Bourchier, 1st Earl of Bath( 20 July 1470 – 30 April 1539) was created Earl of Bath in 1536.
He was feudal baron of Bampton in Devon.
John Bourchier, 1st Baron Berners
John Bourchier, 1st Baron Berners, KG( died May 1474) was an English peer.
Bourchier was the fourth son of William Bourchier, 1st Count of Eu, and his wife Anne of Woodstock, Countess of Buckingham, daughter of Thomas of Woodstock, 1st Duke of Gloucester.
Henry Bourchier, 1st Earl of Essex, and William Bourchier, 9th Baron FitzWarin" jure uxoris", were his elder brothers.
He was knighted in 1426 and in 1455 he was summoned to the House of Lords as" John Bourchier de Berners", which created the title of Baron Berners.
In 1459 he was further honoured when he was made a Knight of the Garter.
He also served as Constable of Windsor Castle from 1461 to 1474.
Lord Berners married Margery, daughter of Sir Richard Berners.
He died in May 1474 and was succeeded in the barony by his grandson John Bourchier, 2nd Baron Berners, his son Sir Humphrey Bourchier having been killed at the Battle of Barnet in 1471.
Margery, Lady Berners, died in 1475.
His daughter Joan Bourchier married Sir Henry Neville( d. 26 July 1469), son of George Neville, 1st Baron Latimer and Elizabeth Beauchamp, and had issue which included Richard Neville, 2nd Baron Latimer, father of John Nevill, 3rd Baron Latimer.
John Bourchier was buried at Chertsey Abbey, in the Runnymede borough of Surrey
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.

Question: Who is the maternal grandmother of Henry Bourchier, 1St Earl Of Essex?
Answer: Eleanor de Bohun