裴矩
Pei Ju's clan was originally from Hedong Commandery (河東, roughly modern Yuncheng, Shanxi). His grandfather Pei Tuo (裴佗) was an official for Northern Wei, and his father Pei Nazhi (裴訥之) served as an official during Northern Wei's branch successor state Eastern Wei and Eastern Wei's successor state Northern Qi. Pei Nazhi died when Pei Ju was young, and Pei Ju was raised by his uncle Pei Rangzhi (裴讓之), himself a famed official during the time.