Lou and Lou both originated from the surname Si, and they are both descendants of the great Yu. The Yellow Emperor gave birth to Yu in five generations, and Yu was given the surname "Si" for his success in ruling the water, and then was given the title of Emperor by Shun. His son, Qi, founded the Xia Dynasty and passed the title to the 14th grandson of Yu, Ci Gui (Xia Jie), who was brutalized by Shang Tang, who expelled Jie from the country. Jie initially fled to Mingjiao (around present-day Changyuan County, Henan Province) and later to Nanchao (southwest of present-day Chaohu City, Anhui Province).
His sons, Zhong He and Zhong Li, embraced their father and took refuge in the Huiji Mountains (southeast of Shaoxing City, Zhejiang Province, where the tomb of Yu's ancestor is located), changing their surname from Si to Lou. In the 11th century B.C., King Wu of Zhou destroyed the Shang Dynasty, to give the Three Emperors and the Five Emperors and all the meritorious ministers after the sealing of the vassal state, got Yu 36th grandson Lou Yunqu (Yu 5th grandson Shaokang after). Because of his predecessor's name Lou, he ordered to add "wood" as "Lou", saying: "No wood is a building, as if no water is a source!" Cited as a counselor Qi Hou, sealed in Qi (now Qixian County, Henan Province), in order to master the summer rituals, the title of the East Lou Gong. The descendants of the descendants of his ancestors to the ancestral seal "building" for the surname, known as the building, Qigi state for the birthplace of the building.
Expanded Information:
Lou distribution and migration:
Lou did not make it into the top one hundred surnames on the mainland and Taiwan. The Lou surname originated from the surname Si, a descendant of Da Yu. After King Wu of Zhou destroyed Shang, he sealed Dong Lou Gong, a descendant of Shaokang, the Xia Emperor, in Qi State (Qi County, Henan Province). During the Spring and Autumn Period, the state of Qi was forced to move eastward under the threat of the surrounding great powers, and one of the descendants of the ruler of Qi was sealed in Louyi (southwest of Zhucheng, present-day Shandong Province), and was later given the surname Lou.
In addition, the Northern Wei Dynasty Pi Lou's, Yi Lou's, Kilou's, B Lou's have changed their surnames to Lou. Lou surname hope to live in Qiao County (now in Anhui Province). In the early years of the Western Han Dynasty, there was a minister Lou Jing, because of the suggestion of Liu Bang into the capital of Guanzhong has merit, was given the surname Liu. After Liu Bang was defeated by the Xiong Nu, he proposed the policy of "peace", which was adopted.
Baidu Encyclopedia - Lou Surname
Baidu Encyclopedia - Lou Surname