Abd ar-Rahman ibn Ubaydullah
أبو محمد عبد الرحمن بن عبيد الله بن حكيم
Fourth generation, died 240 AH. Named in the chains of 2 narrations of the library, 1 in Abu Dawud, 1 in Nasa'i.
2narrations name him
2collections
240 AHhe died
In the books of narrators: Truthful, صدوق.