Thomas de Monthermer, 2nd Baron Monthermer
Thomas de Monthermer, 2nd Baron Monthermer (4 October 1301 – 24 June 1340) was the son of Ralph de Monthermer, 1st Baron Monthermer and Joan of Acre, the daughter of King Edward I of England.
He was a first cousin of King Edward III of England.
Joan of Acre
Joan of Acre (April 1272 – 23 April 1307) was an English princess, a daughter of King Edward I of England and Queen Eleanor of Castile.
The name "Acre" derives from her birthplace in the Holy Land while her parents were on a crusade.
She was married twice; her first husband was Gilbert de Clare, 7th Earl of Gloucester, one of the most powerful nobles in her father's kingdom; her second husband was Ralph de Monthermer, a squire in her household whom she married in secret.
Joan is most notable for the claim that miracles have allegedly taken place at her grave, and for the multiple references to her in literature.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Mary de Monthermer
Mary MacDuff, Countess of Fife(" née" de Monthermer; October 1297 – circa 1371) was an English noblewoman.
She was a daughter of Ralph de Monthermer, 1st Baron Monthermer and his wife Joan of Acre.
Other sources have her being born in 1298.
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.
John Montagu, 1st Baron Montagu
John de Montacute was a 14th- century English nobleman and loyal servant of King Edward III.
He was the son of William Montagu, 1st Earl of Salisbury by his wife Catherine Grandison, and younger brother of William de Montacute, 2nd Earl of Salisbury( 1328 – 1397).
He also had several younger sisters.
Montacute was summoned to parliament in 1357.
Jean Froissart named" Lord John Mountacute" as one of the participants with King Edward III at the Siege of Calais in 1349.
He married Margaret de Monthermer, daughter and heiress of Thomas de Monthermer, 2nd Baron de Monthermer by his wife Margaret de Brewes.
Their children included John Montacute, 3rd Earl of Salisbury( – 1400); Eleanor Montacute, who married John Dinham( 1359 – 1428); Thomas Montagu, Dean of Salisbury Cathedral; and Sybil Montagu, Prioress of Amesbury.
Montagu's descendants quartered the arms of Monthermer:" Or, an eagle displayed vert beaked and membered gules".
Ralph de Monthermer, 1st Baron Monthermer
Ralph de Monthermer, 1st Baron Monthermer, Earl of Gloucester, Hertford, and Atholl( c. 1270 – 5 April 1325) was an English nobleman, who was the son-in- law of King Edward I.
His clandestine marriage to the King's widowed daughter Joan greatly offended her father, but he was quickly persuaded to pardon Ralph.
Robert Clifford, 3rd Baron Clifford
Robert de Clifford, 3rd Baron de Clifford, also 3rd Lord of Skipton( 5 November 1305 – 20 May 1344) was a member of the Clifford family which held the seat of Skipton from 1310 to 1676.
He was the second son of Robert de Clifford, 1st Baron de Clifford and Maud de Clare, eldest daughter of Thomas de Clare, Lord of Thomond and Juliana FitzGerald.
His title was restored to him in 1327 after being forfeited by his elder brother Roger de Clifford, 2nd Baron de Clifford who was hanged for treason.
He married Isabel de Berkeley, daughter of Maurice de Berkeley, 2nd Baron Berkeley at Berkeley Castle in 1328.
They had 7 children.
He was succeeded as Baron De Clifford by the eldest, Robert de Clifford, 4th Baron de Clifford

Question: Who is Thomas De Monthermer, 2Nd Baron Monthermer's maternal grandmother?
Answer: Eleanor of Castile