Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
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.
Edward Jan Römer
Edward Jan Römer or, in Lithuanian, Edvardas Jonas Riomeris (14 May 1806, Vilnius – 15 May 1878, Vilnius) was a Polish writer, translator, social activist and painter.
He was the father of the artists Alfred Izydor Römer, from his first marriage, to Anna Monvid-Belozor (1805–1834), and Edward Mateusz Römer, from his second marriage, to Anna's sister, Sophia (1817–1893).
His father was the politician, Michał Józef Römer.
Edward Mateusz Römer
Edward Mateusz Jan Oktawiusz Römer (Belarusian: Эдвард Матэй Ромер; 19 September 1848, Vologda - 10 February 1900, Lunna) was a Baltic-German/Polish painter who spent much of his career in what is now Belarus.
His brother was the sculptor and painter, Alfred Izydor Römer and his father was Edward Jan Römer, a noted writer and social activist.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
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 the paternal grandfather of Edward Mateusz Römer?
Answer: Michał Józef Römer