question: Who is the paternal grandfather of Walter Butler Of Polestown?
context: [["Walter Butler, 16th Earl of Ormonde", ["Walter Butler( 1703 \u2013 1783), also known as Walter Butler of Kilcash, and Walter Butler of Garryricken, was the\" de jure\" 16th Earl of Ormond and 9th Earl of Ossory.", "He did not assume these titles as he thought them forfeit as a result of the attainder of the 2nd Duke of Ormonde.", "In the peerage of Ireland, the titles were successfully claimed in 1791 by his son John, the 17th Earl."]], ["Edmond Butler (Polestown)", ["Edmond Butler of Polestown,( 1595- 21 April 1636), was a descendant of the Butler family- the Earls of Ormond.", "He was the eldest son of Sir Richard Butler of Poletown.", "His brothers were Richard, Peter and Walter.", "His uncle Peter founded the\" Roscrea\" cadet branch of the family, which is in turn descended from the\" Polestown\" cadet branch.", "He held the office of Member of Parliament( M.P.) for County Kilkenny from 1634 to 1635."]], ["Walter Butler of Polestown", ["Walter Butler of Polestown was High Sheriff of County Kilkenny, Ireland in 1483.", "He was the second son of Sir Edmund MacRichard Butler.", "His nephew Piers would become the 8th Earl of Ormond.", "He was father of Edmond Butler of Polestown."]], ["Peter Butler of Roscrea", ["Peter Butler of Roscrea, County Tipperary, was a descendant of the Butler family- the Earls of Ormond.", "He was the second son of Edmond Butler of Polestown.", "The\" Roscrea\" cadet branch of the family is in turn descended from the\" Polestown\" cadet branch."]], ["Edmund MacRichard Butler", ["Sir Edmund MacRichard Butler of Polestown (1420 \u2013 June 13, 1464) was the eldest son of Sir Richard Butler of Polestown and adopted the Gaelic title of The MacRichard of Ossory."]], ["Walter Butler (Loyalist)", ["Walter Butler (1752 \u2013 October 30, 1781) was a British Loyalist officer during the American Revolution.", "He was born near Johnstown, New York, the son of John Butler, a wealthy Indian agent who worked for Sir William Johnson.", "Walter Butler studied law, and became a lawyer in Albany, New York."]], ["James Butler of Polestown", ["Sir James Butler of Polestown( died 1487) was a warlord in Yorkist Ireland."]], ["Sir Richard Butler (Poletown)", ["Sir Richard Butler of Poletown, County Kilkenny( died 20 August 1619), was a descendant of the Butler family- the Earls of Ormond.", "He was the third son of Edmond Butler of Polestown.", "He was invested as a Knight on 21 April 1605.", "His older brother Peter founded the\" Roscrea\" cadet branch of the family, which is in turn descended from the\" Polestown\" cadet branch."]], ["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."]], ["Sir Walter Butler, 1st Baronet", ["Sir Walter Butler, 1st Baronet( died 1650) was an Irish nobleman.", "He was created a baronet, of Polestown, in the Baronetage of Ireland on 8 July 1645."]]]
supporting_facts: [["Walter Butler of Polestown", 1], ["Edmund MacRichard Butler", 0]]
evidences: [["Walter Butler of Polestown", "father", "Edmund MacRichard Butler"], ["Edmund MacRichard Butler", "father", "Sir Richard Butler of Polestown"]]
answer: Sir Richard Butler of Polestown