Elizabeth of Lancaster, Duchess of Exeter
Elizabeth of Lancaster( bf. 21 February
1363 – 24 November 1426) was the third child of John of Gaunt, 1st Duke of Lancaster, and his first wife Blanche of Lancaster.
Blanche of England
Blanche of England, LG( spring 1392 – 22 May 1409), also known as Blanche of Lancaster, was a member of the House of Lancaster, the daughter of King Henry IV of England by his first wife Mary de Bohun.
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.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Henry of Grosmont, 1st Duke of Lancaster
Henry of Grosmont, 1st Duke of Lancaster, 4th Earl of Leicester and Lancaster, Earl of Derby (– 23 March 1361), of Bolingbroke Castle in Lincolnshire, was a member of the English royal family and a prominent English diplomat, politician, and soldier.
He was the wealthiest and most powerful peer of the realm.
The son and heir of Henry, 3rd Earl of Lancaster, and Maud Chaworth, he became one of King Edward III's most trusted captains in the early phases of the Hundred Years' War and distinguished himself with victory in the Battle of Auberoche.
He was a founding member and the second Knight of the Order of the Garter in 1348, and in 1351 was created Duke of Lancaster.
An intelligent and reflective man, Grosmont taught himself to write and was the author of the book "Livre de seyntz medicines", a highly personal devotional treatise.
He is remembered as one of the founders and early patrons of Corpus Christi College, Cambridge, which was established by two guilds of the town in 1352.
Blanche of Lancaster
Blanche of Lancaster (25 March 1342 – 12 September 1368) was a member of the English royal House of Plantagenet and the daughter of the kingdom's wealthiest and most powerful peer, Henry of Grosmont, 1st Duke of Lancaster.
She was the first wife of John of Gaunt, the mother of King Henry IV, and the grandmother of King Henry V of England.
Blanche of Lancaster, Baroness Wake of Liddell
Blanche of Lancaster, Baroness Wake of Liddell( c. 1305- c. 1380) was an English noblewoman.
She was the eldest daughter of Henry, 3rd Earl of Lancaster and Maud Chaworth.
Blanche was named after her grandmother, Blanche of Artois, who had ruled Navarre as regent.
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 Blanche Of Lancaster's paternal grandfather?
Answer: Henry, 3rd Earl of Lancaster