Sir Edward Barry, 1st Baronet
Sir Edward Barry, 1st Baronet FRS( 1696 – 29 March 1776) was an Irish physician and politician.
James Barry, 4th Earl of Barrymore
James Barry, 4th Earl of Barrymore( 1667 – 5 January 1748) was an Irish soldier and Jacobite politician.
David de Barry, 5th Viscount Buttevant
David Fitz-James de Barry, 18th Baron Barry, 5th Viscount Buttevant (c. 1550 – 10 April 1617) was an Irish peer.
David, born about 1550, was the son of James de Barry, 4th Viscount Buttevant and the Lady Ellen MacCarthy Reagh, illegitimate daughter of Cormac na Haoine MacCarthy Reagh, 10th Prince of Carbery.
He married firstly the Lady Ellen Roche, daughter of David Roche, 5th Viscount Roche of Fermoy, by the Lady Ellen Butler, daughter of James Butler, 10th Baron Dunboyne.
From this marriage were born the Lady Margaret Barry who subsequently married Sir Dermot O'Shaughnessy as her first husband; the Lady Ellen Barry who subsequently married John Fitzgerald of Ballymaloe; the Lady Helen Barry who married Thomas Butler, 10th Earl of Ormonde; and the Honourable David Fitz-David Barry who predeceased his father.
He married secondly, Julia MacCarthy, daughter of Cormac MacCarthy and Joan Butler.
At the outbreak of the Desmond Rebellions, his father, the then Viscount Buttevant, supported the rebels and in the subsequent confiscations of his estates, the friary in Buttevant, together with its glebe, passed into the hands of the poet, Edmund Spenser.
He was noted for his long and bitter feud with Sir Florence MacCarthy, the MacCarthy Mór, whose loyalty to the Crown was always suspect.
De Barry did great damage to his reputation by spreading rumours about MacCarthy's alleged acts of treason, in particular his links with Patrick O'Collun whom MacCarthy had once employed as a fencing master.
In 1594 O'Collun was executed for conspiracy to kill Queen Elizabeth I.
As a result, MacCarthy spent much of his later life in custody.
In 1601, during the Nine Years War the viscount sided with the new President of Munster, Sir George Carew.
In the wake of the Battle of Kinsale, he was granted large estates in Munster which had been forfeited by the MacCarthys.
He died at Barryscourt Castle 10 April 1617.
His title and estate passed to his grandson, who became 1st Earl of Barrymore in 1628.
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
David Barry, 1st Earl of Barrymore
David Barry, 1st Earl of Barrymore, 19th Baron Barry, 6th Viscount Buttevant (10 December 1604 – 29 September 1642) was the posthumous child of David Barry, the son of David de Barry, 5th Viscount Buttevant, and Elizabeth Power, daughter of Richard Power, 4th Baron le Power and Curraghmore.
He was born 10 March 1604 and succeeded to the Barrymore estates on 10 April 1617 on the death of his grandfather.
In 1631 he married the Lady Alice Boyle, daughter of Richard Boyle, 1st Earl of Cork, by his second wife, Catherine Fenton.
Through Cork's influence he was created Earl of Barrymore on 28 February 1628.
During the 1641 rebellion, he sided with the Crown upon whom his title and lands depended.
On 10 May 1642 he stormed the Castle of Ballymacpatrick (now Careysville), near Fermoy, which was held by his grand-aunt, and hanged forty of the rebel leaders before breakfast.
He led a regiment at the Battle of Liscarroll in September 1642.
He died two weeks later of a fever on the 29 September 1642 at his house in Castle Lyons, and was buried in the Boyle Vault by his grieving father-in-law, Richard Boyle.
Youghal, County Cork, Ireland.
David Carnegie, 2nd Earl of Northesk
David Carnegie, 2nd Earl of Northesk was born the son of John Carnegie, 1st Earl of Northesk and Magdalen Haliburton before 1627.
He died on 12 December 1679.
He married Lady Jean Maule, daughter of Patrick Maule, 1st Earl of Panmure, on 19 October 1637 and had seven children:
By his third son, Patrick, he is the seventh great- grandfather of the 15th Earl of Northesk.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.
Patrick Ruthven, 1st Earl of Forth
Patrick Ruthven, 1st Earl of Forth and 1st Earl of Brentford( c. 1573 – 2 February 1651) was a Scottish nobleman, general, and diplomat.
Richard Barry, 2nd Earl of Barrymore
Richard Barry, 2nd Earl of Barrymore, 7th Viscount Buttevant, 20th Baron Barry (4 November 1630 – 1694) was the son of David Barry, 1st Earl of Barrymore and Lady Alice Boyle.
He was married first to Susan Killegrew, daughter of Sir William Killegrew, they had three children: Mary, Catherine, and Susan.
Secondly, he married Martha Lawrence, daughter of Henry Lawrence and Amy Peyton, which produced Laurence Barry, 3rd Earl of Barrymore and Theodora.
He married a third time to Dorothy Ferrar, daughter of John Ferrar of Dromore in February 1666.
From this marriage was born seven children including the first born James Barry, 4th Earl of Barrymore.
Robert Stewart, 1st Earl of March
Robert Stewart, 1st Earl of Lennox then 1st Earl of March( c. 152229 March 1586) was a Scottish nobleman of the family of Stewart of Darnley.

Question: Who is the paternal grandfather of David Barry, 1St Earl Of Barrymore?
Answer: James de Barry, 4th Viscount Buttevant