Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Tiye
Tiye (c. 1398 BC – 1338 BC, also spelled Taia, Tiy and Tiyi) was the daughter of Yuya and Tjuyu.
She became the Great Royal Wife of the Egyptian pharaoh Amenhotep III.
She was the mother of Akhenaten and grandmother of Tutankhamun.
In 2010, DNA analysis confirmed her as the mummy known as "The Elder Lady" found in the tomb of Amenhotep II (KV35) in 1898.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Thutmose (prince)
Thutmose (or, more accurately, Djhutmose) was the eldest son of Pharaoh Amenhotep III and Queen Tiye, who lived during the Eighteenth dynasty of Egypt.
His apparent death led to the reign of Akhenaten, his younger brother—as the successor to the Egyptian throne—and the intrigues of the century leading up to Ramesses II, the start and ultimately the failure of Atenism, the Amarna letters, and the changing roles of the kingdom's powers.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.

Question: Who is the maternal grandfather of Thutmose (Prince)?
Answer: Yuya