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.
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.
Alexandru Coconul
Alexandru Coconul (14 August 1611 – 26 June 1632) was Hospodar and Voivode of Wallachia from 1623 to 1627 and Hospodar of Moldavia from 1629 to 1630.
He was the son of Radu Mihnea, who also was a Hospodar.
He married Ruxandra Beglitzi.
He was the last of Vlad the Impaler's Romanian bloodline.
He died on June 26, 1632, in Istanbul.
It is possible that Radu Gioan Bey was his illegitimate son, however no documents reveal a legitimate heir.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Radu Mihnea
Radu Mihnea (1586 – 13 January 1626) was Voivode (Prince) of Wallachia between September 1601 and March 1602, and again between March and May 1611, September 1611 and August 1616, August 1620 and August 1623, and Voivode (Prince) of Moldavia in 1616–1619, 1623–1626.
He was the illegitimate son of Mihnea Turcitul by Voica Bratcul.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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.

Question: Who is the paternal grandfather of Alexandru Coconul?
Answer: Mihnea Turcitul