In Ibn Abi Usaibia, one Egyptian practitioner is introduced as follows:
Al-Shaikh al-Sadīd ibn Abī ‘l-Bayān. Sadīd al-Dīn Abū ‘l-Fadl Dā`ud ibn Abī ‘l-Bayan Sulaimān ibn Abī ‘l-Faraj Isrā`īl ibn Abī ‘l-Tayyib Sulaimān ibn Mubārak, was a Karaite Israelite.
Cough, yes, well, say no more.
Apparently — judging from a comment a bit further on — he was actually known as “Ibn Bayan”.