Ahmad Nahavandi
Ahmad ibn Muhammad al- Nahawandi was a Persian astronomer of the 8th and 9th centuries.
His name indicates that he was from Nahavand, a city in Iran.
He lived and worked at the Academy of Gundishapur, in Khuzestan, Iran, at the time of Yahya ibn Khalid ibn Barmak, who died in 803 AD, where he is reported to have been making astronomical observations around the year 800 AD.
He and Mashallah ibn Athari were among the earliest Islamic era astronomers who flourished during the reign of al- Mansur, the second Abbasid Caliph.
He also compiled tables called the comprehensive( Mushtamil).
Yahya Ibn Ibrahim
Yahya Ibn Ibrahim( c. 440/1048) was a leader of the Godala tribe.
Yahya Ibn Ibrahim's primary significance was in his involvement with Abdallah ibn Yasin, a Berber Muslim theologian who founded the Almoravid movement.
Yahya ibn Muhammad
Yahya ibn Muhammad  was the fifth Idrisid ruler and sultan of Morocco.
A son of previous sultan Muhammad ibn Idris, he took over the rule in Morocco after the death of his heirless uncle
Ali I in 848.
During his rule, which saw no significant conflicts, he settled in Fes numerous immigrants from Al-Andalus and Ifriqiya, which had been expelled after revolting against the Umayyad and Aghlabids respectively.
He also commissioned several relevant construction in the city, the mosque of Al-Karaouine and of al-Andalus (859).
He died in 864, aged around 35.
He was succeeded by his son Yahya II ibn Yahya.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Marzuban ibn Muhammad ibn Shaddad
Marzuban ibn Muhammad ibn Shaddad was a Kurdish ruler, the brother of Lashkari ibn Muhammad.
He succeeded his brother to the throne of the Shaddadids in 978.
He was incompetent, however, and reigned only until his murder by his younger brother al- Fadhl ibn Muhammad in 985.
Muhammad bin Yahya al-Ninowy
Muhammad ibn Yahya ibn Muhammad ibn Sa’id ibn Muhammad ibn Ali al- Ninowy( born 1970) is a Syrian- born American Islamic Scholar, Theologian, and Medical Doctor.
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.
Muhammad ibn Idris
Muhammad Ben Idris Al-Thani Ben Idris Al-Awal Ben Abdellah Al-Kamel  known as Muhammad ibn Idris  was one of the sons and successor of Idris II of Morocco.
He took power in 828 and died in 836.
Abdullah ibn Muhammad
Abdullah ibn Muhammad also known as Tahir ibn Muhammad(" Tahirclean/ pure") or Tayib ibn Muhammad was one of the sons of Muhammad and Khadija.
Qasim ibn Muhammad was his older brother.
Muhammad gave him the name of his father.
Abdullah died in childhood in 615 CE.
Musa ibn Yahya
Mûsâ ibn
Yahy â( Arabic: م وسى بن يحيى, mūsā ben yaḥy ā) was a member of the powerful Barmakids clan, the son of Yahya ibn Khalid and brother of Ja'far ibn Yahya.
He ruled Damascus between 793 and 794.

Question: Who is Yahya Ibn Muhammad's paternal grandfather?