William Foster (bishop)
William Foster, D.D. (3 July 1744 – November 1797) was a Church of Ireland bishop.
The younger son of Anthony Foster, Chief Baron of the Irish Exchequer, and his first wife Elizabeth Burgh, he was chaplain to the Irish House of Commons (1780–89), then successively Bishop of Cork and Ross (1789–1790), Bishop of Kilmore (1790–1796) and Bishop of Clogher (1796–1797).
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
William Foster (divine)
William Foster( born 1591), was an English clergyman and writer.
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.
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.
Anthony Foster
Anthony Foster (1705 – April 1779), of Collon, County Louth, was an Anglo-Irish politician and judge.
He was the eldest son of John Foster, MP for Dunleer, and his wife Elizabeth Fortescue, youngest daughter of William Fortescue of Newrath, who was a member of the Fortescue family which later held the title Earl of Clermont.
The Fosters had come to Ireland from Cumberland in the previous century, and had acquired lands and political influence in Louth.
He was Chief Baron of the Irish Exchequer 1766-1777.
Prior to appointment to the Bench he represented the family constituency of Dunleer in the Irish House of Commons from 1738 to 1761 and subsequently Louth from 1761 to 1767.
Kaoru Hatoyama
After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.
Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.

Question: Who is William Foster (Bishop)'s paternal grandmother?
Answer: Elizabeth Fortescue