According to the research held in 2000, the number of Gangneung Yoo clan was 178913.

Their founder was Yoo Jeon [ja] who came from the Northern Song dynasty.

According to their family tree, Yoo Jeon [ja] was an Emperor Gaozu of Han's 41st descendant.

Yoo Jeon [ja] worked as minister of defense (兵部尚書, Bingbu Shangshu) in the Northern Song dynasty during Emperor Shenzong of Song's reign.

However, he was ousted by Wang Anshi because he was a member of old policies party.