Abu Sa'id Ubaid Allah ibn Bakhtyashu (940–1058), also spelled Bukhtishu, Bukhtyashu, and Bakhtshooa in many texts, was an 11th-century Syrian physician, descendant of Bakhtshooa Gondishapoori. He spoke the Syriac language.
He was the last representative of the Bukhtyashu family of Nestorian Christian physicians, who emigrated from Jundishapur to Baghdad in 765. His main works are the Reminder of the Homestayer, dealing with the philosophical terms used in medicine, and a treatise on lovesickness.
- C. Brocklmann: Encyclopaedia of Islam (t. 1, 601, 1911).
See also