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.
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.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Cadfan ap Cadwaladr
Cadfan ap Cadwaladr, Lord of Ceredigion (c. 1140 - c. 1215) was the elder son of Cadwaladr ap Gruffydd, the brother of Owain Gwynedd, King of Gwynedd and overlord of all Wales.
His mother was his father's first wife, Gwerfel ferch Gwrgan.
He was probably born in Ceredigion, where his father held extensive estates.
His father was banished in 1144.
He should not be confused with Cadell ap Gruffydd, King of Deheubarth, who took Ceredigion from Hywel ab Owain Gwynedd, son of Owain Gwynedd, in 1150.
Cadfan probably spent the rest of his life in exile in England.
He married Gwenllian, a daughter of Owain Cyfeiliog.
He is known to have had only one daughter: Tangwystl ferch Cadfan (born c. 1212).
John Wyn ap Cadwaladr
John Wyn ap Cadwaladr was the member of Parliament for the constituency of Merioneth in 1559.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Cadwallon ap Cadfan
Cadwallon ap Cadfan( died 634) was the King of Gwynedd from around 625 until his death in battle.
The son and successor of Cadfan ap Iago, he is best remembered as the King of the Britons who invaded and conquered the Kingdom of Northumbria, defeating and killing its king, Edwin, prior to his own death in battle against Oswald of Bernicia.
His conquest of Northumbria, which he held for a year or two after Edwin died, made him the last Briton to hold substantial territory in eastern Britain until the rise of the House of Tudor.
He was thereafter remembered as a national hero by the Britons and as a tyrant by the Anglo- Saxons of Northumbria.
Cadwaladr ap Gruffydd
Cadwaladr ap Gruffydd (c. 1100 – 1172) was the third son of Gruffudd ap Cynan, King of Gwynedd, and brother of Owain Gwynedd.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).

Question: Who is the paternal grandfather of Cadfan Ap Cadwaladr?
Answer: Gruffudd ap Cynan