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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.
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.
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.
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.
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.
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.
Alice Comyn, Countess of Buchan
Alice Comyn, Countess of Buchan, Lady Beaumont( 1289 – 3 July 1349) was a Scottish noblewoman, a member of the powerful Comyn family which supported the Balliols, claimants to the disputed Scottish throne against their rivals, the Bruces.
She was the niece of John Comyn, Earl of Buchan, to whom she was also heiress, and after his death the Earldom of Buchan was successfully claimed by her husband Henry de Beaumont, Earl of Buchan, by right of his wife.
His long struggle to claim her Earldom of Buchan was one of the causes of the Second War of Scottish Independence.
Alice was the maternal grandmother of Blanche of Lancaster, and thus great- grandmother of King Henry IV of England.

Question: Who is the paternal grandmother of Blanche Of Lancaster?
Answer: Maud Chaworth