《北史·本记·卷十一》
杨铉的儿子杨元寿，北魏初年任武川镇司马，因而在神武树颓安家。
铉子元寿，魏初为武川镇司马，因家于神武树颓焉。
Yang Xuan's son Yang Yuanshou was the Sima of Wuchuan Town in the early Northern Wei Dynasty, and therefore built his home at Shenwu Tree.