This article proposes that the owner of the epitaph ‘Datang Gu Lufei Muzhi Ziming’ collected by the Kubosō Memorial Museum of Arts should be the wife of Sui’an King Li Shou, the owner of another epitaph ‘Datang Suianwang Muzhi ziming’ now stored at Northwest University Museum. The discovery of the former epitaph provides not only important information for studying the biography of Sui’an King but also new data for the Lu lineage, one of the Xianbei elite lineages, during the Northern Dynasties.