《北史·列传·卷二十九》
朝廷任命他的父亲杨津为并州刺史、北道大行台，他随父亲来到任所。
朝廷以其父津为并州刺史、北道大行台，愔随之任。
The imperial court appointed his father Yang Jin as the governor of Bingzhou and the acting chief of the northern road. He went to the post with his father.