Abū l-ʿAtāhiya (d. 210/825 or 211/826), "father of lunacy," was the nickname of the ʿAbbāsid poet Abū Isḥāq Ismāʿīl b. al-Qāsim b. Suwayd b. Kaysān. He was born in ʿAyn al-Tamr, on the Euphrates River, in 130/748 and died in 210/825 or 211/826. He was among those poets of the late-second/eighth and early-third/nineth centuries, Bashshār b. Burd (d. 167/784 or 168/785) and Abū Nuwās (d. between mid-198 and early 200/813-5) chief among them,