Abu Ishaq Ibrahim
Abu Ishaq Ibrahim, also known by his honorific title of Umdat al-Dawla ("Mainstay of the Empire"), was a Buyid prince, who was the youngest son of the Buyid ruler Mu'izz al-Dawla.
Ibrahim II of Ifriqiya
Abu Ishaq Ibrahim II ibn Ahmad( 27 June 850 – 23 October 902) was the ninth Aghlabid emir of Ifriqiya.
He ruled from 875 until his abdication in 902.
Abu Ishaq Ibrahim of Ghazna
Abu Ishaq Ibrahim, also known as Ishaq ibn Alp- Tegin, was a Turkic officer, who was the Samanid governor of Ghazna from September 963 to November 966.
He was the son and successor of Alp- Tegin.
Abu Ishaq Ibrahim briefly lost control of Ghazna after an invasion by its former ruler, Abu Bakr Lawik.
However, he managed to regain it with Samanid aid.
Some time later, Abu Ishaq Ibrahim died and was succeeded by a Turkic slave commander named Bilgetegin.
Bilgetegin
Bilgetegin was a Turkic officer, who was the Samanid governor of Ghazna from 12 November 966 to 975.
He was successor of Abu Ishaq Ibrahim of Ghazna.
On 12 November 966, when Abu Ishaq Ibrahim of Ghazna died, he left no child for throne of the Ghaznavid dynasty.
Turkic leaders and princes chose Bilgetegin as Samanid ruler of Ghazna in November 966.
He died in 975 in Ghazna, and Böritigin of Ghazni was his successor.
Ibrahim Khawas
Abu Ishaq Ibrahim bin Ahmed bin Ismail Alkhawas or" Ebrahim Khawas"( Persian ابراهیم الخواص) was a Persian scholar of the Sunnis in the 3rd century AH.
Abdallah II of Ifriqiya
Abu'l- Abbas Abdallah II(" Abū l- ʿ Abbās ʿ Abd Allāh"; d. 27 July 903) was the tenth Emir of the Aghlabids in Ifriqiya( 902–903).
He took over the Emirate after his father Abu Ishaq Ibrahim II was forced to abdicate after a tyrannical rule.
He immediately set about trying to reduce the autonomy of the Kutama Berbers in order to stop the Ismailite mission of Abu' Abdullah al- Shi'i, however without success.
An effort to replace the Malikite law schools with Hanifites from Iraq also failed.
Abdullah was murdered by his son Abu Muda Ziyadat Allah in 903.
Al Sahili
Abu Ishaq Ibrahim Al- Sahili( 1290–1346) was a prominent architect of the Mali Empire under the rule of Mansa Musa.
Mohammed bin Khalifa bin Zayed Al Nahyan
Mohammed bin Khalifa bin Zayed Al Nahyan is a Emirati royal politician.
He is the son of current Emir of Abu Dhabi emirate and President of the United Arab Emirates, Khalifa bin Zayed Al Nahyan.
Sheikh Mohammed is the member of Executive Council of Abu Dhabi( the cabinet of Abu Dhabi).
He is also on the board of directors of Abu Dhabi Investment Authority( Abu Dhabi's sovereign wealth fund), under the chairman, his father.
In 2009, he was appointed chairman of Abu Dhabi Retirement Pensions and Benefits Fund.
He is the chairman of Abu Dhabi department of finance while acting chairman is Hamad Al Hurr Al Suwaidi.
Mu'izz al-Dawla
Ahmad ibn Buya (Persian: احمد بن بویه, died April 8, 967), after 945 better known by his "laqab" of Mu'izz al-Dawla ("Fortifier of the Dynasty"), was the first of the Buyid emirs of Iraq, ruling from 945 until his death.
The son of Daylamite fisherman who had converted to Islam,
Ahmad ibn Buya was born in the mountainous region of Daylam, and by 928, he along with his two brothers served the Daylamite military leader Makan ibn Kaki.
However, they quickly changed their allegiance to the Ziyarid ruler Mardavij, but some years later rebelled against him after founding out that he planned to murder one of the brothers.
In 935/6, Ahmad ibn Buya unsuccessfully invaded Kerman, and was later sent to Istakhr.
From there he started making incursions into Khuzestan and later Iraq; by 945, he was officially recognized as the ruler of Iraq and Khuzestan and had received the title of "Mu'izz al-Dawla" from the Caliph, while his two other brother were the rulers of other territories and had also received titles from the Caliph.
Throughout his rule, Mu'izz al-Dawla was devoted in conflicts with other dynasties for control over Iraq—in 946, an important battle took place in Baghdad between Mu'izz al-Dawla and the Hamdanid amir Nasir al-Dawla, which lasted several months, with Mu'izz al-Dawla ending as the victor. Mu'izz
al-Dawla also fought against the Batihah amirate several times, but was unable to decisively defeat it. Mu'izz
al-Dawla also had problems with some of his Daylamite kinsmen, who would sometimes rebel against him, the most dangerous rebellion being under Ruzbahan from 955 to 957.
By Mu'izz al-Dawla's death in 967, he had defeated all his foes and was the unchallenged ruler of Iraq.
He was succeeded by his son Izz al-Dawla.
Abu Bakr Lawik
Abu Bakr Lawik was a ruler of Ghazna( in modern Afghanistan) from the Lawik dynasty.
He was most likely a vassal of the Samanid Empire.
In 962, the Turkic slave commander Alp- Tegin seized Ghazna from him.
However, a few years he later managed to re-capture the town from Abu Ishaq Ibrahim, the son and successor of Alp- Tegin.
This was not to last long; Abu Ishaq Ibrahim shortly returned to the town with Samanid aid, and took control of the town once again.
Abu Bakr Lawik is thereafter no longer mentioned; he died before 977, the year that Ghaznavid control was established in Ghazna.

Question: Who is Abu Ishaq Ibrahim's paternal grandfather?
Answer: Buya