John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
Yujiulü Anluochen
Yujiulü Anluochen( pinyin: Yùjiǔlǘ Ānluóchén)( ?- 554) was the last khagan of the Rouran( 553 -554) in the east.
He was the son of Yujiulü Anagui.
Yujiulü Poluomen
Yujiulü Poluomen was a khagan of Rouran with the title Mioukesheju Khagan( 彌偶可社句可汗).
He was a grandson of Yujiulü Nagai and a cousin of Yujiulü Anagui.
Yujiulü Doulun
Yujiulü Doulan (pinyin: Yùjiǔlǘ Dòulún)
(?
-492)
was khagan of the Rouran (485-492) with the title of Fumingdun Khagan (伏名敦可汗).
He was the son of Yujiulü Yucheng.
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.
Yujiulü Yucheng
Yujiulü Yucheng (pinyin: Yùjiǔlǘ Yúchéng)
(?
-485) was ruler of the Rouran (464-485) with the title of Shouluobuzhen Khagan (受羅部真可汗).
He was the first Rouran ruler to adopt Chinese style era name, which was Yongkang (永康 Yǒngkāng 464-484).
He was the elder son of Yujiulü Tuhezhen.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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 Yujiulü Doulun's paternal grandfather?
Answer: Yujiulü Tuhezhen