Maria Palaiologina
Maria Palaiologina  was the daughter of the Byzantine Emperor Michael VIII Palaiologos
(ruled 1258-1282)
who became the wife of the Mongol ruler Abaqa Khan, and an influential Christian leader among the Mongols.
After Abaqa's death she became the leader of a Monastery in Constantinople which was popularly named after her as Saint Mary of the Mongols.
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.
Catherine Salvaresso
Catherine Salvaresso, or" Ecaterina Salvaresso"( died 1590 in Tripoli) was a princess consort of Wallachia.
She was married to Alexandru II Mircea and was the mother of Mihnea Turcitul.
She was the regent of Wallachia during the minority of her son from 1577 until 1583.
Salvaresso was from a Catholic Italian family and a resident of the Italian quarter in Constantinople, where she met Alexandru II Mircea during his pilgrimage.
They married in Pera in 1558, and she converted to the Orthodox faith.
She founded the convent Slătioarele and imported to first printing press in Bucharest in 1573.
In 1577, her spouse died and she became the regent of her son, who was at that time a hostage of the Ottomans.
Alexander II Mircea
Alexandru II Mircea (3 March 1529 – 11 September 1577) was a Voivode or Prince of Wallachia from 1568 to 1574 and 1574 to 1577.
He was the father of Mihnea II Turcitul.
His parents were Mircea III Dracul and Maria Despina.
Raised by the Turks in Istanbul, he hardly knew his country of origin before gaining the throne of Wallachia.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.

Question: Who is the maternal grandfather of Alexander Ii Mircea?