Balthasar of Żagań
Balthasar, Duke of Żagań (– Przewóz, 15 July 1472), was a Duke of Żagań-Przewóz since 1439 (with his brothers as co-rulers until 1449), from 1449 Duke of Żagań.
Deposed during 1461–1468, he recovered the Duchy in this year until shortly before his death.
He was the oldest son of Duke Jan I of Żagań by his wife Scholastika, daughter of Rudolf III, Duke of Saxe-Wittemberg and Elector of Saxony.
He was named after his maternal great-grandfather, Balthasar, Landgrave of Thuringia
(Scholastika's maternal grandfather).
Rudolf of Żagań
Rudolf of Żagań( ca. 1418 – 18 September 1454) was a Duke of Żagań- Przewóz since 1439( with his brothers as co-rulers until 1449), from 1449 Duke of Żagań( as co-ruler of his older brother).
He was the second son of Duke Jan I of Żagań by his wife Scholastika, daughter of Rudolf III, Duke of Saxe- Wittemberg and Elector of Saxony.
He was named after his maternal grandfather.
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.
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.
Wenceslaus of Żagań
Wenceslaus of Żagań( ca. 1434 – 29 April 1488) was a Duke of Żagań- Przewóz since 1439( with his brothers as co-rulers until 1449), from 1449 Duke of Przewóz( as co-ruler of his younger brother).
He was the third son of Duke Jan I of Żagań by his wife Scholastika, daughter of Rudolf III, Duke of Saxe- Wittemberg and Elector of Saxony.
His uncle, Joe II of Żagań, was his guiding mentor through childhood.
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
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Jan I of Żagań
Jan I of Żagań  (– 12 April 1439) was a Duke of Żagań-Głogów, since 1397 (until 1412 with his brothers as co-rulers), since 1403 Duke of Żagań, Krosno Odrzańskie and Świebodzin (again, until 1412 with his brothers as co-rulers) and since 1412 sole ruler of Żagań and Przewóz.
He was the eldest son of Henry VIII the Sparrow, Duke of Głogów by his wife Katharina, daughter of Duke Władysław of Opole.

Question: Who is Balthasar Of Żagań's paternal grandfather?