Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Alexander Lindsay, 6th Earl of Balcarres
Alexander Lindsay, 6th Earl of Balcarres and" de jure" 23rd Earl of Crawford( 18 January 175227 March 1825) was the son of James Lindsay, 5th Earl of Balcarres.
He was a general in the British Army.
James Grimston, 2nd Earl of Verulam
James Walter Grimston, 2nd Earl of Verulam( 20 February 1809 – 27 July 1895), known as Viscount Grimston from 1815 to 1845, was a British peer and Conservative politician.
He was the eldest son of James Walter Grimston, 1st Earl of Verulam, and Lady Charlotte Jenkinson.
He succeeded his father as 2nd Earl of Verulam in November 1845.
In 1860, The Times noted that Grimston was one of only three to hold peerages in all three Kingdoms of England, Scotland and Ireland.
James Grimston, 5th Earl of Verulam
James Brabazon Grimston, 5th Earl of Verulam (11 October 1910 – 13 October 1960) was a British peer and businessman.
Verulam was the eldest son of James Grimston, 4th Earl of Verulam and Lady Violet Brabazon, younger daughter of the 12th Earl of Meath.
He was educated at Eton and Christ Church, Oxford.
His first job was in Austria after which he was managing director of Enfield Zinc Products.
In 1949 he became chairman of Enfield Rolling Mills, Ltd.
He was mayor of St Albans in 1956; and president of the Cremation Society from 1955 to 1958.
He was also a director of the District Bank and sat on various committees concerned with health, welfare and disability.
John Boyle, 5th Earl of Cork
John Boyle, 5th Earl of Cork and 5th Earl of Orrery, FRS( 13 January 1707 – 16 November 1762) was a writer and a friend of Jonathan Swift, Alexander Pope and Samuel Johnson.
The only son of Charles Boyle, 4th Earl of Orrery, and his wife Lady Elizabeth Cecil( 1687 – 1708), daughter of John Cecil, 5th Earl of Exeter.
He was born at Westminster and attended Christ Church, Oxford.
He published a translation of the letters of Pliny the Younger in 1751, and" Remarks on the Life and Writings of Jonathan Swift" in the same year, and the" Memoirs of Robert Carey, 1st Earl of Monmouth".
His" Letters from Italy" was published in 1774 by J. Duncombe.
James Grimston, 4th Earl of Verulam
James Walter Grimston, 4th Earl of Verulam (17 April 1880 – 29 November 1949) was a British peer, electrical engineer and businessman, sometimes identified with the fringes of the intelligence service.
Verulam was the son of James Grimston, 3rd Earl of Verulam, and Margaret Frances Graham.
He married Lady Violet Constance Maitland Brabazon (1886–1936), younger daughter of Reginald Brabazon, 12th Earl of Meath.
He founded Enfield Cables Ltd and had many business interests in oil and telecommunications, including as a director of British Thomson-Houston.
He reputedly allowed MI6 the use of some of the premises on his estate and was a business associate and personal friend of World War II internee Robert Liversidge.
James Lindsay, 5th Earl of Balcarres
James Lindsay, 5th Earl of Balcarres( 14 November 1691 – 20 February 1768) was a Scottish peer, the son of Colin Lindsay, 3rd Earl of Balcarres and Lady Margaret Campbell, daughter of the Earl of Loudoun.
He became the 5th Earl of Balcarres on 25 July 1736 on the death of his brother Alexander Lindsay, 4th Earl of Balcarres.
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Margaret de Stafford
Margaret Stafford( born c. 1364; died 9 June 1396) was the daughter of Hugh de Stafford, 2nd Earl of Stafford, and Philippa de Beauchamp.
She was the first wife of Ralph Neville, 1st Earl of Westmorland, and the grandmother of the 2nd Earl.

Question: Who is James Grimston, 5Th Earl Of Verulam's paternal grandmother?
Answer: Margaret Frances Graham