《元史·列传·卷十六》
李恒的父亲名李唯忠，太祖征河西时为蒙古军所俘，从此归附于蒙古，在经略中原中有功，授淄川达鲁花赤。中统三年，李王反叛，李恒与父亲报告了朝廷，世祖嘉奖，授李恒为淄莱路奥鲁总管，佩金符。
世祖嘉其功，授淄莱路奥鲁总管，佩金符，并偿其所失家资。
Li Heng's father's name was Li Weizhong. When Taizu conquered Hexi, he was captured by the Mongolian army and has since surrendered to Mongolia. He made contributions to the strategy of the Central Plains and was awarded the title of Zi Chuan Daluhuachi. In the third year of Zhongtong, King Li rebelled, Li Heng and his father reported to the imperial court, and Shizu was rewarded and awarded Li Heng as the Oulu road general manager of Zile Road, with a gold talisman.