Imam Ibn Rajab al Hanbali (736 – 795 AH) He was the noble Imaam, the Haafidh, the Critic, Zayn-ud-Deen ‘Abdur-Rahmaan bin Ahmad bin ‘Abdir-Rahmaan bin al-Hasan bin Muhammad bin Abil-Barakaat Mas’ood As-Salaamee Al-Baghdaadee (due to his place of birth), Al-Hanbalee (due to his madh-hab), Ad-Dimashqee (due to his place of residence and death). His kunyah was Abul-Faraj, and his nickname was Ibn Rajab, which was the nickname of his grandfather who was born in that month (of Rajab).
He was born in Baghdad in 736H and was raised by a knowledgeable family, firmly rooted in knowledge, nobility and righteousness. His father played the greatest role in directing him towards the beneficial knowledge.
Al-Haafidh Ibn Rajab, may Allaah have mercy on him, was deeply attached to the works of Shaikh-ul-Islaam Ibn Taimiyyah, for he would issue legal rulings according to them and would constantly reference his books. This is since he served as a student under Ibn Qayyim al-Jawziyyah, the most outstanding student of Shaikh-ul-Islaam Ibn Taimiyyah, may Allah have mercy on all of them. But in spite of this, he (rahimahullaah) wasn’t a blind follower or a fanatical adherent (to his teacher). Rather, he would review, authenticate, verify and follow the evidences.
Al-Haafidh Ibn Rajab, may Allaah have mercy on him passed to the realm of the Akhira in Ramadaan, 795H. He died while in Damascus.