William C. Foster
William C. Foster (December 28, 1880 – January 18, 1923) was a pioneer of cinematography.
John Christian Kunkel
John Christian Kunkel (September 18, 1816 – October 14, 1870) was a Whig and Republican member of the U.S. House of Representatives from Pennsylvania.
He was the grandfather of John Crain Kunkel.
John Foster of Dunleer
John Foster of Dunleer (born 1665-died 16 May 1747) was elected member to the Irish House of Commons for the constituency of "Dunleer", in County Louth.
He formerly held the position of Mayor of Dunleer Corporation.
He was the son of Colonel Anthony Foster of Dunleer, whose father Samuel had come to Ireland from Cumberland.
He married in 1704 Elizabeth Fortescue, youngest daughter of William Fortescue of Newrath, County Louth, and first cousin to William Henry Fortescue, 1st Earl of Clermont.
They had six children:
William Foster (divine)
William Foster( born 1591), was an English clergyman and writer.
John W. Boehne
John William Boehne( October 28, 1856 – December 27, 1946) was a U.S. Representative from Indiana, father of John William Boehne, Jr.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
John William Foster
John William Foster (1745 – January 1809), of Rosy Park, was an Anglo-Irish volunteer and politician.
He was the grandson of John Foster of Dunleer, MP for Dunleer and Elizabeth, née Fortescue.
Foster was appointed High Sheriff of Louth for 1776 and then elected member to the Irish House of Commons for Dunleer in 1783 and held this seat until 1790.
His parents were William Foster and Patience Fowke who married in 1743.
Foster married 1788, Rebecca (b.c. 1764 d. 1853)
only child of Hamilton McClure.
Esq., of Dublin, and died 1809.
He was ancestor of the Foster family of Ballymascanlon.
William Foster (footballer)
William Foster( 1913 – unknown) was an English professional footballer who played in the Football League for Mansfield Town.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Question: Who is the paternal grandfather of John William Foster?