Zain ad-Din, Abu al-Faraj, 'Abd ar-Rahman ibn Ahmad ibn 'Abd ar-Rahman ibn al-Hasan ibn Muhammad ibn Abi al-Barakat Mas'ud as-Sulami, al-Baghdadi, al-Hanbali, also known as Ibn Rajab, which was a nickname he inherited from his grandfather who was born the month of Rajab, was a Muslim scholar.
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