Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Emmanuele de Gregorio
Emmanuele de Gregorio( 18 December 1758 – 7 November 1839) was an Italian cardinal of the Roman Catholic Church and son of Leopoldo de Gregorio, Marquis of Esquilache.
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.
Maximilian I, Holy Roman Emperor
Maximilian I (22 March 1459 – 12 January 1519) was Holy Roman Emperor from 1508 until his death.
He was never crowned by the pope, as the journey to Rome was always too risky.
He was instead proclaimed emperor elect by Pope Julius II at Trent, thus breaking the long tradition
of requiring a papal coronation for the adoption of the imperial title.
Maximilian was the son of Frederick III, Holy Roman Emperor, and Eleanor of Portugal.
He ruled jointly with his father for the last ten years of the latter's reign, from to his father's death in 1493.
Maximilian expanded the influence of the House of Habsburg through war and his marriage in 1477 to Mary of Burgundy, the heiress to the Duchy of Burgundy, though he also lost the Austrian territories in today's Switzerland to the Swiss Confederacy.
Through marriage of his son Philip the Handsome to eventual queen Joanna of Castile in 1498, Maximilian helped to establish the Habsburg dynasty in Spain, which allowed his grandson Charles to hold the thrones of both Castile and Aragon.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Leopoldo de Austria
Leopoldo de Austria (between 1513 and 1515 in Austria – 27 September 1557 in Cordoba) was an illegitimate son of Maximilian I, Holy Roman Emperor and Bishop of Cordoba (1596–1601).
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.

Question: Who is Leopoldo De Austria's paternal grandfather?
Answer: Frederick III, Holy Roman Emperor