1. Comes from the surname Ji
They are descendants of the Yellow Emperor, and they use fiefs as their surnames. During the Western Zhou Dynasty, Tang Shuyu, the son of King Wu of Zhou Dynasty, was granted a title in Jin and established the Jin Kingdom. His descendants include Jinghou. The grandson of Jin Jinghou, Mingbin, was granted the title of Luanyi (today's Luancheng area in Hebei Province) and was known as Luan Bin in the world. His descendants took the fiefdom as their surname and called them Luan. He has been a member of the Jin Dynasty for generations and gradually became a prominent member of the Luan family.
2. From the surname Jiang
They are descendants of Emperor Yan, and they use people’s names as their surnames. During the Western Zhou Dynasty, Jiang Ziya was granted the title of Qi and established the Qi State. During the Spring and Autumn Period, the son of Duke Hui of Qi was named Jian, also given the courtesy name Ziluan. His descendants used the "Luan" of his name as their surname and became a branch of the Luan family. The famous family came from Wei County in Xihe.
Extended information:
Historical celebrities
Luan Bu
A native of Liang in the Western Han Dynasty. When he was young, he was employed in a restaurant, but was later robbed and made into a slave. Later he became the official of Liang Wang. Emperor Gaozu of the Han Dynasty killed Peng Yue and ordered not to collect the body. Luan Bu cried and buried Peng Yue, his good friend, at the risk of being killed. He was sentenced to death by the officials.
Luan Bu said: "Peng Yue is a good friend of mine. He was killed for a trivial matter. The ministers here are worried that they will be killed for a trivial matter like Peng Yue. I am the same, so it is better to arrive early. Kill me." After hearing this, Emperor Gaozu of the Han Dynasty felt that what he said was right, and because he admired his courage and loyalty, he exempted him from the crime and made him a captain.
During the reign of Emperor Wen, Luan Bu became Prime Minister of Yan and was granted the title of Marquis of Li. He died in the fifth year of the Zhongyuan Dynasty. Both Yan and Qi established a commune for him, named Luan Commune.
Luan Wenbo
was a famous scholar in the Later Wei Dynasty, with thousands of disciples. Delin also went to school and began to master poetry and calligraphy. He is good at domestic affairs and is the most mysterious among all the people.
Luan Chongji
A good official in the Song Dynasty, a native of Fengqiu. He is well versed in grammar, honest as an official, diligent in political affairs, and is famous for his outstanding political achievements.
Baidu Encyclopedia-Luan Surname