Question: Who is Shepseskare's paternal grandmother?

Hüma Hatun
Hüma Hatun (1410 ‒ September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II.
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.
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.
Shepseskare
Shepseskare or Shepseskara (Egyptian for "Noble is the Soul of Ra") was an Ancient Egyptian pharaoh, the fourth or fifth ruler of the Fifth Dynasty (2494–2345 BC) during the Old Kingdom period.
Shepseskare lived in the mid-25th century BC and was probably the owner of an unfinished pyramid in Abusir, which was abandoned after a few weeks of work in the earliest stages of its construction.
Following historical sources, Shepseskare was traditionally believed to have reigned for seven years, succeeding Neferirkare Kakai and preceding Neferefre on the throne, making him the fourth ruler of the dynasty.
He is the most obscure ruler of this dynasty and the Egyptologist Miroslav Verner has strongly argued that Shepseskare's reign lasted only a few months at the most, after that of Neferefre.
This conclusion is based upon the state and location of Shepseskare's unfinished pyramid in Abusir as well as the very small number of artefacts attributable to this king.
Verner's arguments have now convinced several Egyptologists such as Darrell Baker and Erik Hornung.
Shepseskare's relations to his predecessor and successor are not known for certain.
Verner has proposed that he was a son of Sahure and a brother to Neferirkare Kakai, who briefly seized the throne following the premature death of his predecessor and probable nephew, Neferefre.
Shepseskare may himself have died unexpectedly or he may have lost the throne to another of his nephews, the future pharaoh Nyuserre Ini.
The possibility that Shepseskare was a short-lived usurper from outside the royal family cannot be totally excluded.
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.
Neferefre
Neferefre Isi (also known as Raneferef, Ranefer and in Greek as Cherês, "Χέρης") was an ancient Egyptian pharaoh, likely the fourth but also possibly the fifth ruler of the Fifth Dynasty during the Old Kingdom period.
He was very probably the eldest son of pharaoh Neferirkare Kakai and queen Khentkaus II, known as prince Ranefer before he ascended the throne.
Neferefre started a pyramid for himself in the royal necropolis of Abusir called "Netjeribau Raneferef", which means "The bas of Neferefre are divine".
The pyramid was never finished, with a mason's inscription showing works on the stone structure were abandoned during or shortly after the king's second year of reign.
Together with the sparsity of attestations contemporaneous with his reign, this is taken by Egyptologists as evidence that Neferefre died unexpectedly after two to three years on the throne.
Neferefre was nonetheless buried in his pyramid, hastily completed in the form of a mastaba by his second successor and presumably younger brother, pharaoh Nyuserre Ini.
Fragments of his mummy were uncovered there, showing that he died in his early twenties.
Little is known of Neferefre's activities beyond laying the foundations of his pyramid and attempting to finish that of his father.
A single text shows that Neferefre had planned or just started to build a sun temple called "Hotep-Re", meaning "Ra is content" or "Ra's offering table", which possibly never functioned as such given the brevity of the king's reign.
After his death, Neferefre might have been succeeded by an ephemeral and little-known pharaoh, Shepseskare, whose relation with Neferefre remains highly uncertain and debated.
Like other Fifth Dynasty kings, Neferefre benefited from a funerary cult.
Cult rituals took place in a temple built by Nyuserre next to the former's pyramid.
The cult seems to have been abandoned by the late Old Kingdom period and Neferefre fell into obscurity.
The unfinished aspect of his pyramid and mortuary complex may have attracted less attention from grave and stone robbers than nearby pyramids.
As a consequence more statues of Neferefre have been uncovered in his complex than in any other Fifth Dynasty mortuary temple.
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.
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.
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.

Answer: Khentkaus II