Edmond Butler of Killoshulan
Edmond Butler of Killoshulan, Duiske, County Kilkenny( died 12 July 1691) was the youngest son of Piers Butler of Duiske and Margaret Netterville, daughter of Nicholas Netterville, 1st Viscount Netterville.
His grandfather was Edward Butler, 1st Viscount Galmoye.
Killoshulan is a townland in the barony of Crannagh, County Kilkenny.
Piers FitzThomas Butler
Piers FitzThomas Butler of Duiske( died 1601), was the illegitimate son of Thomas Butler, 10th Earl of Ormond.
The lands of Duiske Abbey had reverted to his father.
In 1597, the earl executed a deed of conveyance in his favour for the lands( when Piers had reached maturity).
Theobald Butler of Polestown
Theobald Butler was the illegitimate son of Sir James Butler of Polestown and his wife Sabh Kavanagh.
He was the elder brother of Piers Butler, 8th Earl of Ormond and of Edmond Butler of Polestown.
Edward Butler, 1st Viscount Galmoye
Sir Edward Butler, 1st Viscount Galmoye (died 1653) was the eldest son of Piers FitzThomas Butler and the Honourable Katherine Fleming, daughter and co-heiress of Thomas Fleming, 10th Baron Slane and his wife Catherine Preston.
His father was the illegitimate son of Thomas Butler, 10th Earl of Ormond.
Edward Butler was invested as a Knight on 1 November 1619.
He held the office of High Sheriff of County Kilkenny, Ireland in 1640.
In 1646 he attended the Confederation of Kilkenny.
He was created 1st Viscount Galmoye on 16 May 1646.
He lived at Galmoy Castle, County Kilkenny.
He died in 1653 and was succeeded by his grandson, Edward Butler.
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.
Piers Butler of Cahir
Piers Butler of Cahir( 1425 – 1464) was the son of James" Gallda" Butler.
He was born and died in Tipperary, Ireland.
Edward Butler, 2nd Viscount Galmoye
Edward Butler, 2nd Viscount Galmoye( c. 1627 – after 24 October 1667) was the son of Piers Butler of Duiske and Margaret Netterville, daughter of Nicholas Netterville, 1st Viscount Netterville.
His grandfather was Edward Butler, 1st Viscount Galmoye.
Butler succeeded to the title of Viscount Galmoye, in county Kilkenny in 1653 following the death of his grandfather, his father having predeceased him in 1650.
He had a younger brother, Major Edmond Butler of Killoshulan.
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.
Thomas Butler, 3rd Baron Cahir
Thomas Butler, 3rd Baron Cahir or Caher( died) was an Anglo- Irish peer.
He was the son of Piers Butler, the nephew of his namesake the 2nd Baron and the grandson of the 1st Baron.
James Butler of Duiske
James Butler of Duiske was a younger son of James Butler, 9th Earl of Ormond and Lady Joan Fitzgerald.
In 1576, Queen Elizabeth I of England awarded him the lands of Duiske Abbey which had been confiscated by the Crown.

Question: Who is the paternal grandfather of Piers Butler Of Duiske?
Answer: Piers FitzThomas Butler