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His full name and nasab was Abd al-Rahman ibn Ali ibn Muhammad (Arabic: عبد الرحمن بن علي بن محمد‎) ibn `Ubayd-Allah ibn `Abd-Allah ibn Hammadi ibn Ahmad ibn Muhammad ibn Ja`far ibn `Abd-Allah ibn al-Qasim ibn al-Nadr ibn al-Qasim ibn Muhammad ibn `Abd-Allah ibn al-Faqih `Abd al-Rahman ibn al-Faqih al-Qasim ibn Muhammad ibn Abi Bakr. He was known for his works in exegesis of the Qur'an as well as his numerous hadith writings. One of the more famous of the latter is his "Tahqiq", a compendium of both the hadith evidences used by the Hanbali school of jurisprudential thought and a work of comparative law (Arabic: فقه Fiqh). He is said to have been a precocious child who allegedly made his first speech at the age of ten (attended by a crowd of 50,000), and authored his first book at the age of thirteen.