John de Vere, 16th Earl of Oxford
John de Vere, 16th Earl of Oxford (1516 – 3 August 1562) was born to John de Vere, 15th Earl of Oxford and Elizabeth Trussell, daughter of Edward Trussell.
He was styled Lord Bolebec 1526 to 1540 before he succeeded to his father's title.
Aubrey de Vere, 10th Earl of Oxford
Aubrey de Vere, 10th Earl of Oxford( c. 1338 – 15 February 1400) was the third son of John de Vere, 7th Earl of Oxford and Maud de Badlesmere, daughter of Bartholomew de Badlesmere, 1st Lord Badlesmere.
Aubrey de Vere had three brothers, John, Thomas, and Robert, and three sisters.
Margaret, Maud and Elizabeth.
His eldest brother, John, married the daughter of Hugh Courtenay, Earl of Devon, but died in 1350 in his father's lifetime.
Another brother, Robert, also died in his father's lifetime.
Aubrey de Vere's third brother, Thomas, succeeded his father as 8th Earl of Oxford, and was in turn succeeded by his only son, Robert de Vere, 9th Earl of Oxford, who died in 1392 without issue, leaving Aubrey de Vere to inherit the earldom.
In 1360 Aubrey de Vere was made steward of the royal forest of Havering in Essex.
In 1367 was retained to' abide for life' with the Black Prince, with a substantial allowance.
He was knighted, made constable of Wallingford Castle in 1375 and also given the honours of Wallingford and St. Valery, though he gave up Wallingford in 1378 for Hadleigh Castle.
Edward III used him as an ambassador in seeking peace with France.
In 1381, de Vere became a Chamberlain of the Royal Household and member of the privy council.
In 1388 his nephew, Robert de Vere, Duke of Ireland and 9th Earl of Oxford was deemed a traitor, causing Aubrey to lose his post of chamberlain.
However, after Robert ’s death in 1392, the king gave Aubrey the title of Earl of Oxford allowing him to take a seat in parliament.
Aubrey ’s son, Richard became the 11th Earl of Oxford on his death.
An administrator of Aubrey de Veer appears as William Tasburgh, of Raylegh, parson, in 1401.
Bernard Mordaunt Ward
Bernard Mordaunt Ward (20 January 1893 – 12 October 1945) was a British author and third-generation soldier most noted for his support of the Oxfordian theory of Shakespeare authorship and writing the first documentary biography of Edward de Vere, 17th Earl of Oxford.
Bridget de Vere, Countess of Berkshire
Bridget de Vere, Countess of Berkshire (6 April 1584 – December 1630/March 1631) was an English noblewoman, the daughter of Edward de Vere, 17th Earl of Oxford.
Bridget was brought up by her maternal grandfather, the powerful statesman William Cecil, 1st Baron Burghley.
She was also styled Lady Norris of Rycote and Viscountess Thame.
She married Francis Norris, 1st Earl of Berkshire; however, the marriage was not a success, and they separated in 1606.
Anne Cecil, Countess of Oxford
Anne Cecil, Countess of Oxford( 5 December 1556 – 5 June 1588) was the daughter of the statesman William Cecil, 1st Baron Burghley, chief adviser to Queen Elizabeth I of England, and the translator Mildred Cooke.
In 1571 she became the first wife of Edward de Vere, 17th Earl of Oxford.
She served as a Maid of Honour to Queen Elizabeth before her marriage.
Elizabeth Trentham, Countess of Oxford
Elizabeth de Vere, Countess of Oxford, formerly Elizabeth Trentham( d. c. December 1612), was the second wife of the Elizabethan courtier and poet Edward de Vere, 17th Earl of Oxford.
Susan de Vere, Countess of Montgomery
Susan de Vere, Countess of Montgomery( 26 May 1587 – 1628/29), was an English court office holder.
She served as lady- in- waiting to the queen consort of England, Anne of Denmark.
She was the youngest daughter of Elizabethan courtier, poet, and playwright Edward de Vere, 17th Earl of Oxford.
Robert de Vere, 5th Earl of Oxford
Robert de Vere, 5th Earl of Oxford( c. 1220 – 1296) was the son and heir of Hugh de Vere, 4th Earl of Oxford, and chamberlain to Queen Eleanor.
Edward de Vere, 17th Earl of Oxford
Edward de Vere, 17th Earl of Oxford (12 April 155024 June 1604) was an English peer and courtier of the Elizabethan era.
Oxford was heir to the second oldest earldom in the kingdom, a court favourite for a time, a sought-after patron of the arts, and noted by his contemporaries as a lyric poet and court playwright, but his volatile temperament precluded him from attaining any courtly or governmental responsibility and contributed to the dissipation of his estate.
Since the 1920s he has been among the most popular alternative candidates proposed for the authorship of Shakespeare's works.
De Vere was the only son of John de Vere, 16th Earl of Oxford, and Margery Golding.
After the death of his father in 1562, he became a ward of Queen Elizabeth and was sent to live in the household of her principal advisor, Sir William Cecil.
He married Cecil's daughter, Anne, with whom he had five children.
De Vere was estranged from her for five years after he refused to acknowledge her first child as his.
De Vere was a champion jouster and travelled widely throughout Italy and France.
He was among the first to compose love poetry at the Elizabethan court, and he was praised as a playwright,
though none of the plays known as his survive.
A stream of dedications praised de Vere for his generous patronage of literary, religious, musical, and medical works, and he patronised both adult and boy acting companies, as well as musicians, tumblers, acrobats and performing animals.
He fell out of favour with the Queen in the early 1580s and was exiled from court after impregnating one of her maids of honour, Anne Vavasour, which instigated violent street brawls between de Vere's retainers and her uncles.
De Vere was reconciled to the Queen in 1583, but all opportunities for advancement had been lost.
In 1586, the Queen granted de Vere a £1,000 annuity to relieve his financial distress caused by his extravagance and selling off his income-producing lands for ready money.
After his wife's death, he married Elizabeth Trentham, one of the Queen's maids of honour, with whom he had an heir, Henry de Vere.
He died in 1604, having spent the entirety of his inherited estates.
Margery Golding
Margery Golding, Countess of Oxford( c. 1526 – 2 December 1568) was the second wife of John de Vere, 16th Earl of Oxford, the mother of Edward de Vere, 17th Earl of Oxford, and the half- sister of Arthur Golding, the English translator.

Question: Who is Edward De Vere, 17Th Earl Of Oxford's paternal grandfather?
Answer: John de Vere, 15th Earl of Oxford