Question: Who is Susan De Vere, Countess Of Montgomery's paternal grandfather?

Knowledge 1: 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. [SEP] Knowledge 2: 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.
Knowledge 1: 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. [SEP] Knowledge 2: Sir Aubrey de Vere, 2nd Baronet
Sir Aubrey (Hunt) de Vere, 2nd Baronet (28 August 1788 – 5 July 1846) was an Anglo-Irish poet and landowner.De Vere was the son of Sir Vere Hunt, 1st Baronet and Hon.Eleanor Pery, daughter of William Pery, 1st Baron Glentworth.He was educated at Harrow School, where he was a childhood friend of Lord Byron, and Trinity College, Dublin.He married Mary Spring Rice, the daughter of Stephen Edward Rice and Catherine Spring, and sister of Thomas Spring Rice, 1st Baron Monteagle of Brandon, in 1807.He succeeded to his father's title in 1818.The Hunt/de Vere family estate for 300 years (1657–1957), including the period of the de Vere Baronetcy of Curragh, is the present day Curraghchase Forest Park, in County Limerick.De Vere spent most of his life on the estate and was closely involved in its management.He suffered much trouble from his ownership of the island of Lundy, which his father, who was not much of a businessman, had unwisely purchased in 1802, and which became a heavy drain on the family's finances.Sir Vere was never able to find a purchaser for Lundy, and it took his son until 1834 to dispose of it.Sir Aubrey stood for election in the 1820 General Election and came in third with 2921 votes.He changed his surname from Hunt to de Vere in 1832, in reference to his Earl of Oxford ancestors, dating back to Aubrey de Vere I, a tenant-in-chief in England of William the Conqueror in 1086.He served as High Sheriff of County Limerick in 1811.Sir Aubrey was a poet.Wordsworth called his sonnets the most perfect of the age.These and his drama, "Mary Tudor: An Historical Drama", were published by his son the poet Mr. Aubrey Thomas de Vere in 1875 and 1884.
Knowledge 1: 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. [SEP] Knowledge 2: Sir Aubrey de Vere, 2nd Baronet
Sir Aubrey (Hunt) de Vere, 2nd Baronet (28 August 1788 – 5 July 1846) was an Anglo-Irish poet and landowner.De Vere was the son of Sir Vere Hunt, 1st Baronet and Hon.Eleanor Pery, daughter of William Pery, 1st Baron Glentworth.He was educated at Harrow School, where he was a childhood friend of Lord Byron, and Trinity College, Dublin.He married Mary Spring Rice, the daughter of Stephen Edward Rice and Catherine Spring, and sister of Thomas Spring Rice, 1st Baron Monteagle of Brandon, in 1807.He succeeded to his father's title in 1818.The Hunt/de Vere family estate for 300 years (1657–1957), including the period of the de Vere Baronetcy of Curragh, is the present day Curraghchase Forest Park, in County Limerick.De Vere spent most of his life on the estate and was closely involved in its management.He suffered much trouble from his ownership of the island of Lundy, which his father, who was not much of a businessman, had unwisely purchased in 1802, and which became a heavy drain on the family's finances.Sir Vere was never able to find a purchaser for Lundy, and it took his son until 1834 to dispose of it.Sir Aubrey stood for election in the 1820 General Election and came in third with 2921 votes.He changed his surname from Hunt to de Vere in 1832, in reference to his Earl of Oxford ancestors, dating back to Aubrey de Vere I, a tenant-in-chief in England of William the Conqueror in 1086.He served as High Sheriff of County Limerick in 1811.Sir Aubrey was a poet.Wordsworth called his sonnets the most perfect of the age.These and his drama, "Mary Tudor: An Historical Drama", were published by his son the poet Mr. Aubrey Thomas de Vere in 1875 and 1884.

Answer: John de Vere, 16th Earl of Oxford