There was a Lei family in Fan Yang, and the Lu family was the main name, and the sounds of Lei and Lu were similar, so the surname was changed to Lu in the early Later Zhou Dynasty. At the beginning of the Northern Song Dynasty, Lu Yan, a loyal minister of the Later Zhou Dynasty, took his son Chai Xijie under his knees and named him Lu Xuan in order to protect Chai Rong's bloodline. Also, in the Tang Dynasty, there was the Lu family in Sanyuan (now part of Shaanxi), which was mistakenly thought to be the birthplace of the Lu family in many places due to migration. The earliest surname based on a place was in the southwest of Changqing County, Shandong Province today. .
The Lu family tree appeared in the late matrilineal clan commune in primitive society, and emerged with the division of labor among the matrilineal clans. In the Eastern Han and Jin Dynasties. As the population gradually increased, family tree names generally used only two characters, for example: Lu Zhi (? -192) in the Eastern Han Dynasty and Lu Xun in the Western Jin Dynasty. These two were famous Yubu (tribe) leaders at that time. During the Sui Dynasty, the border poet Lu Sidao appeared.
Population distribution
During the Song Dynasty, there were approximately 260,000 people with the surname Lu, accounting for approximately 0.34 of the population of the Song Dynasty, ranking 62nd. Mainly concentrated in Shandong, Henan, and Zhejiang, the three provinces with the Lu surname account for about 44% of the total population; followed by Hebei, Fujian, Anhui, Guangxi, and Jiangsu, the five provinces with the Lu surname also account for about 44% of the total population. Shandong is the province with the largest population surnamed Lu, home to 22% of the total population. The Lu surname forms two large population gathering areas: Shandong, Henan, Hebei and Zhejiang and Fujian.