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.
Purnima (Hindi actress)
Purnima Das Verma( born Meherbhano Mohammad Ali) was an Indian film actress who worked predominantly in Hindi language films.
She is the grandmother of actor Emraan Hashmi.
Fiachrae
Fiachrae was an Irish prince, the son of the high king Eochaid Mugmedón (d.362) by his wife Mongfind, sister of Crimthann mac Fidaig (d.367).
He was ancestor of the Uí Fiachrach dynasties of Connacht.
He lived in the late 4th century.
"The Violent Death of Crimthann mac Fidaig and of the Three Sons of Eochaid Muigmedón" gives the story of the sons of Eochaid Mugmedón.
According to this saga, his half-brother the high king Niall Noigiallach (d.405) made Fiachrae's full brother Brión
his champion and Brion seized the kingship of Connacht.
This led to war between Brion and Fiachrae and they fought a battle at Damchluain (near Tuam, Co. Galway).
Fiachrae was captured and taken to Tara.
However Fiachrae's son Nath Í rallied forces and defeated and slew Brion at a second battle at Damchluain.
Fiachrae was now released by Niall and given Brion's position as champion and levier of his hostages and rents.
With his brother Ailill, he then went to take hostages from Munster.
they defeated Eochaid mac Crimthainn and took loot and hostages.
However, Fiachrae was severely wounded and died at Ferrach in Meath on the way home.
The hostages of Munster were buried alive with him as a tribute to him.
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.
Nath Í mac Fiachrach
Nath Í, also known as Dathí, son of Fiachrae, son of Eochaid Mugmedon, was a semi-historical Irish king of the 5th century, the father of the likely-historical king Ailill Molt and the ancestor of the Uí Fiachrach dynasties of early medieval Connacht.
According to legend, he was a High King of Ireland, and died after being struck by lightning while on an expedition to the Alps.
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.
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.
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.

Question: Who is the paternal grandmother of Nath Í Mac Fiachrach?
Answer: Mongfind