This is the main source of the Lou surname in Henan province. The most prominent clan of the Lou 娄 surname is that of the Qiao Commandery (谯郡, present-day Bozhou, Anhui), which was founded by Lou Shide, a famous chancellor of the Tang dynasty. His younger brother was also a high-ranking official, serving as the prefect of Dai Prefecture. The Shanghai Library has in its collection five genealogy books of Lou-surnamed lineages. Nine other genealogy books are known to be in the collection of other institutions in China and the United States.