Edmund Butler, 2nd Viscount Mountgarret
Edmund Butler, 2nd Viscount Mountgarret (c. 1562 – 1602), was the son of Richard Butler, 1st Viscount Mountgarret and Eleanor Butler.
Sir Edmund Butler, 2nd Baronet
Sir Edmund Butler, 2nd Baronet( died before 1653), of Cloughgrenan( townland near Carlow), was the son of Sir Thomas Butler, 1st Baronet and Anne Colclough.
He was admitted to Lincoln's Inn on 5 June 1637.
He succeeded to the title after 1639.
He died intestate and his estate was administered to his widow in 1653.
Edmund Butler, 4th Viscount Mountgarret
Edmund Butler, 4th Viscount Mountgarret( 1595 – 1679) was the son of Richard Butler, 3rd Viscount Mountgarret.
He acceded to his title on the death of his father in 1651 and retained his lands in the north and east of Kilkenny while many others whose families had been involved in the Catholic Confederacy lost theirs.
His father had been heavily involved in the rebellion but Edmund received a pardon for all treasons and rebellions from King Charles II and was restored to his estates.
Helen Butler
Helen Butler( died 28 January 1631), also known as the Honorable Helen Butler, was the daughter of Edmund Butler, 2nd Viscount Mountgarret and Grizel FitzPatrick.
She married her second cousin Walter Butler, 11th Earl of Ormond.
Their common great- grandfather was Piers Butler, 8th Earl of Ormond.
She had three sons and nine daughters:
Edmund Butler, 11th Viscount Mountgarret
Edmund Butler, 11th Viscount Mountgarret( 27 July 1745 – 16 July 1793) was an Irish peer and politician.
He was the son of Edmund Butler, 10th Viscount Mountgarret and Charlotte Bradstreet, daughter of Sir Simon Bradstreet, 1st Bart.
He married with Henrietta Butler, daughter of Somerset Hamilton Butler, 1st Earl of Carrick on 7 October 1768 and had issued.
He was a Member of Parliament( MP) in the Irish House of Commons for Kilkenny County from 1776 to 1779.
Richard Butler, 1st Viscount Mountgarret
Richard Butler, 1st Viscount Mountgarret (1500 – 20 May 1571) was the son of Piers Butler, 8th Earl of Ormond and Lady Margaret Fitzgerald.
He married his half first cousin Eleanor Butler, daughter of Theobald Butler of Polestown, the illegitimate brother of the 8th Earl of Ormond.
He was created 1st Viscount Mountgarret in 1550.
Edmund Butler, 1st Earl of Kilkenny
Edmund Butler, 1st Earl of Kilkenny, 12th Viscount Mountgarret (6 January 1771 – 16 July 1846) was created Earl of Kilkenny on 20 December 1793.
The son of Edmund Butler, 11th Viscount Mountgarret and Henrietta Butler, he was thus a member of the powerful Butler Dynasty descended from the illustrious House of Butler of Ormond, who purchased and resided at Kilkenny Castle from 1391 to 1967.
He married Mildred Fowler, daughter of Robert Fowler, Archbishop of Dublin, without issue.
On his death the Earldom thus became extinct and his nephew, Henry Edmund Butler, became the 13th Lord Viscount Mountgarret in 1846.
Piers Butler of Duiske
Piers Butler of Duiske, Barrowmount, County Kilkenny( died 1650) was the son of Edward Butler, 1st Viscount Galmoye and Hon. Anne Butler, daughter of Edmund Butler, 2nd Viscount Mountgarret.
He gained the rank of Colonel of Dragoons.
After the Battle of Lambstown, County Wexford, he was taken prisoner, and was" killed, it is said after quarter being given" by the Cromwellian Captain William Bolton.
Richard Butler, 3rd Viscount Mountgarret
Richard Butler, 3rd Viscount Mountgarret( 1578 – 1651) was the son of Edmund Butler, 2nd Viscount Mountgarret and Grany or Grizzel, daughter of Barnaby Fitzpatrick, 1st Baron Upper Ossory.
He is best known for his participation in the Irish Confederate Wars on behalf of the Irish Confederate Catholics.
Henry Butler, 14th Viscount Mountgarret
Henry Edmund Butler, 14th Viscount Mountgarret( 18 December 1844 – 2 October 1912), was a British aristocrat.

Question: Who is Edmund Butler, 2Nd Viscount Mountgarret's paternal grandfather?
Answer: Piers Butler, 8th Earl of Ormond