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.
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.
Bahram-Shah of Ghazna
Bahram-Shah (full name:"Yamin ad-Dawlah wa Amin al-Milla Abul-Muzaffar Bahram-Shah") (1084 - 1157) was Sultan of the Ghaznavid empire from 25 February 1117 to 1152.
Son of Mas'ud III and Gawhar Khatun, sister of Sanjar, sultan of the Great Seljuq empire.
During his entire reign, his empire was a tributary of the Great Seljuq empire.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Khosrow of Ghazni
Moez ad-dowleh Khosro of Ghazni was king of Ghazni during 1168 to 1176.
He was the last Ghaznavids king who ruled Ghazni.
He was son of Bahram-Shah of Ghazna and heir of crown.
During Khosro reign, his country was under attack from two sides.
One side were Ghurids that had gotten a powerful army and were trying to extend their borders.
on the other side Ahmad Sanjar and Seljuqi government were had weakened and Oghuz Turks has attacked them.
At last, in 1176, Oghuz Turks succeeded to overcome Moez ad-dowleh Khosro of Ghazni.
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.

Question: Who is the paternal grandmother of Khosrow Of Ghazni?
Answer: Gawhar Khatun