Ubaidullah ibn Umar al-Qawariri
أبو سعيد عبيد الله بن عمر بن ميسرة
Fourth generation, died 233 AH in Baghdad. Named in the chains of 105 narrations of the library, 1 in Bukhari, 37 in Muslim, 43 in Abu Dawud.
105narrations name him
6collections
233 AHhe died, in Baghdad
In the books of narrators: Trustworthy and exact, ثقة ثبت.