Musnad Ahmad ibn Hanbal is a collection of Hadith collected by the Islamic scholar Ahmad ibn Hanbal, to whom the Hanbali fiqh (legislation) is attributed.
History of the Hanbalites (Arabic: "طبقات الحنابلة"‎ ‎ ; "Ṭabaqāt al-Ḥanābilah" ) is a biographical dictionary covering Hanbali scholars, written by Ibn Abi Ya'la (d. 1131 AD).
 The book starts from the life of the founder Ahmad ibn Hanbal himself.
 Later Al-Hafiz Ibn Rajab (d. 1393 AD) wrote a sequel to this book under the name "Continuation of the history of the Hanbalites" ("Dhayl ‘alá Ṭabaqāt al-Ḥanābilah").
 The "Continuation" covers those who died after 460 AH.
 Modern publishing may available in 4 volumes where two volumes is original book by Ibn Abi Ya'la and following two volumes from Ibn Rajab addition.
The Hanbali school (Arabic: المذهب الحنبلي‎ ‎ ) is one of the four traditional Sunni Islamic schools of jurisprudence (fiqh).
 It is named after the Iraqi scholar Ahmad ibn Hanbal (d. 855), and was institutionalized by his students.
 The Hanbali madhhab is the smallest of four major Sunni schools, the others being the Hanafi, Maliki and Shafi`i.
Taqī ad-Dīn Ahmad ibn Taymiyyah (Arabic: تقي الدين أحمد ابن تيمية, died 26 September 1328), known as Ibn Taymiyyah for short, was a controversial medieval Sunni Muslim theologian, jurisconsult, logician, and reformer.
 A member of the Hanbali school of jurisprudence founded by Ahmad ibn Hanbal, Ibn Taymiyyah was also a member of the Qadiriyya Sufi order founded by the twelfth-century mystic and saint Abdul-Qadir Gilani.
 A polarizing figure in his own lifetime, Ibn Taymiyyah's contentious and iconoclastic views on such widely accepted Sunni doctrines of the medieval period such as the veneration of saints and the visitation to their tomb-shrines made him very unpopular with the vast majority of the orthodox religious scholars of the time, under whose orders he was imprisoned several times during his life.
Abu al-Hasan 'Ali ibn 'Abd al-Rahman ibn Ahmad ibn Yunus al-Sadafi al-Misri (Arabic: ابن يونس) (c. 950-1009) was an important Egyptian Muslim astronomer and mathematician, whose works are noted for being ahead of their time, having been based on meticulous calculations and attention to detail.
Kitab Akhbar as-Sifat, or Bāz al‐ašhab al‐munqadd 'alà muhālifī al‐madhab (The Gray Falcon Which Attacks the Offenders of the [Hanbalī] School), is a theological polemic written by Hanbali Islamic scholar Abu'l-Faraj ibn al-Jawzi between 1185 and 1192.
 The polemic is primarily directed at what, Ibn al-Jawzi held to be, growing anthropomorphic beliefs within the Hanbali school of jurisprudential thought.
 It singles out three prominent teachers within the Hanbali school: Al Hasan ibn Hamid (d. 1013), or Ibn Hamid, Muhammad ibn al-Husayn (d.1066), or al-Qadi Abu Ya'la, and Ibn al-Jawzi's own teacher, Ali ibn Ubayd Allah, or Ibn az-Zaghuni (d. 1132), contending that they shirked from the beliefs of the school's founder, Ahmad ibn Hanbal.
Ibn Qudāmah al-Maqdīsī Muwaffaq al-Dīn Abū Muḥammad ʿAbd Allāh b. Aḥmad b. Muḥammad (Arabic ابن قدامة, "Ibn Qudāmah"; 1147 - 7 July 1223), often referred to as Ibn Qudamah or Ibn Qudama for short, was a Sunni Muslim ascetic, jurisconsult, traditionalist theologian, and religious mystic.
 Having authored many important treatises on jurisprudence and religious doctrine, including one of the standard works of Hanbali law, the revered "al-Mug̲h̲nī", Ibn Qudamah is highly regarded in Sunnism for being one of the most notable and influential thinkers of the Hanbali school of orthodox Sunni jurisprudence.
 Within that school, he is one of the few thinkers to be given the honorific epithet of Shaykh of Islam, which is a prestigious title bestowed by Sunnis on some of the most important thinkers of their tradition.
 A proponent of the classical Sunni position of the "differences between the scholars being a mercy," Ibn Qudamah is famous for having said: "The consensus of the Imams of jurisprudence is an overwhelming proof and their disagreement is a vast mercy."
Aḥmad bin Muḥammad bin Ḥanbal Abū ʿAbd Allāh al-Shaybānī (Arabic: احمد بن محمد بن حنبل ابو عبد الله الشيباني‎ ‎ ; 780–855 CE/164–241 AH), often referred to as Aḥmad ibn Ḥanbal or Ibn Ḥanbal for short, or reverentially as Imam Aḥmad by Sunni Muslims, was an Arab Muslim jurist, theologian, ascetic, and hadith traditionist.
 An enormously influential and vigorous scholar during his lifetime, Ibn Hanbal went on to become "one of the most venerated" and celebrated personalities in the tradition of Sunni Islam, within which he was often referred to by such reverent epithets as True Shaykh of Islam, Proof of the Faith, and Seal of the Mujtahid Imams.
 He has been retrospectively described as "the most significant exponent of the traditionalist approach in Sunni Islam," with his "profound influence affecting almost every area of" orthodox Sunni thought.
 One of the foremost classical proponents of the importance of using hadith literature to govern Islamic law and life, Ibn Hanbal is famous for compiling one of the most important Sunni hadith collections, the celebrated "Musnad", an enormous compendium of prophetic traditions that has continued to wield considerable influence in the field of hadith studies up to the present time.
 Additionally, Ibn Hanbal is also honored as the founder of the Hanbali school of Sunni jurisprudence, which is one of the four major orthodox legal schools of Sunni Islam.
Abu al-Wafa Ali Ibn Aqil ibn Ahmad al-Baghdadi (1040–1119) was an Islamic theologian from Baghdad, Iraq.
 He was trained in the tenets of the Hanbali school ("madhab") for eleven years under scholars such as the Qadi Abu Ya'la.
 Despite this, Ibn Aqil was forced into hiding by the Hanbalis for frequenting the circles of groups who were at odds with the Hanbali tradition.
 In one of his reminiscences, he remarks that his Hanbali companions wanted him to abandon the company of certain scholars, and complains that it hindered him from acquiring useful knowledge.
 Among his works of jurisprudence that have survived are "Wadih fi usul al-fiqh" and (in part) "Kitab al-funun", a work comprising 800 volumes.
Shams al-Dīn Abū ʿAbd Allāh Muḥammad ibn Abī Bakr ibn Ayyūb al-Zurʿī l-Dimashqī l-Ḥanbalī (1292–1350 CE / 691 AH–751 AH), commonly known as Ibn Qayyim al-Jawziyya ("The son of the principal of [the school of] Jawziyyah") or Ibn al-Qayyim ("Son of the principal"; ابن قيم الجوزية) for short, or reverentially as Imam Ibn al-Qayyim in Sunni tradition, was an important medieval Islamic jurisconsult, theologian, and spiritual writer.
 Belonging to the Hanbali school of orthodox Sunni jurisprudence, of which he is regarded as "one of the most important thinkers," Ibn al-Qayyim is today best remembered as the foremost disciple and student of the controversial and influential fourteenth-century Sunni reformer Ibn Taymiyyah, with whom he was imprisoned in 1326 for dissenting against established tradition during Ibn Taymiyyah's famous incarceration in the Citadel of Damascus.

Question: Who was member of the Hanbali school of jurisprudence founded by Ahmad ibn Hanbal, Ibn Taymiyyah or Ibn Yunus
Answer: Taqī ad-Dīn Ahmad ibn Taymiyyah