Humphrey of Montfort
Humphrey of Montfort (died 12 February 1284) was a nobleman of the Kingdom of Jerusalem.
Humphrey was the second son of Philip of Montfort, Lord of Tyre by his second wife Maria of Antioch-Armenia, Lady of Toron.
On 1 October 1274, Humphrey married Eschive d'Ibelin (1253–1312), daughter of John d'Ibelin, Lord of Beirut and his wife Alice de la Roche sur l'Ognon.
Their children were:
In 1282, upon the death of his sister-in-law Isabella of Ibelin, Eschive succeeded her as lady of Beirut.
When Humphrey's older brother Jean died in 1283, Humphrey was allowed to succeed to Jean's Lordship of Tyre by King Hugh III of Cyprus, who had a few years earlier confirmed the Montforts in their possessions of Tyre but reserved the right to re-take the fiefdom if Jean died without issue.
However, upon Humphrey's death 6 months later, the new king Henry II retook the fiefdom (probably because he considered Humphrey's sons too young to guarantee the defence of Tyre) and granted it to his sister Margaret.
Philip of Montfort, Lord of Tyre
Philip Ι of Montfort, (d. 17 March 1270,Tyre) was Lord of La Ferté-Alais and Castres-en-Albigeois 1228–1270, Lord of Tyre 1246–1270, and Lord of Toron aft.
1240–1270.
He was the son of Guy of Montfort and Helvis of Ibelin (daughter of Balian of Ibelin).
Amaury I de Montfort
Amaury I de Montfort( died) was Lord of Montfort, son of Guillaume de Montfort of Hainaut, the first Lord of Montfort.
The castle of Montfort l'Amaury, of which he started the construction, was completed by his son Simon I de Montfort, who succeeded him as Lord of Montfort.
He married Bertrade, whose origins are unknown.
He and his wife had three children:
Hannah Arnold
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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.
Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.
Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.
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.
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.
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.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.

Question: Who is Humphrey Of Montfort's paternal grandmother?
Answer: Helvis of Ibelin