Louis VI, Elector Palatine
Ludwig VI, Elector Palatine (4 July 1539 in Simmern – 22 October 1583 in Heidelberg), was an Elector from the Palatinate-Simmern branch of the house of Wittelsbach.
He was the first-born son of Frederick III, Elector Palatine and Marie of Brandenburg-Kulmbach.
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.
Frederick IV, Elector Palatine
Frederick IV, Elector Palatine of the Rhine (5 March 1574 – 19 September 1610),
only surviving son of Louis VI, Elector Palatine and Elisabeth of Hesse, called "Frederick the Righteous" (French: "Frédéric IV le juste").
Anne Sophie Reventlow
Anne Sophie von Reventlow( 16 April 1693 – 7 January 1743) was Queen of Denmark and Norway from 1721 to 1730 as the second wife of Frederick IV of Denmark and Norway.
Adolphus Frederick IV, Duke of Mecklenburg-Strelitz
Adolphus Frederick IV( 5 May 1738 – 2 June 1794) was a Duke of Mecklenburg- Strelitz.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Fred Le Deux
Frederick" Fred" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).
He is the grandfather of Tom Hawkins.

Question: Who is Frederick Iv, Elector Palatine's paternal grandfather?
Answer: Frederick III