Where did Pingliang Lingtai Li's surname come from?

Longxi. Lingtai County is an escrow county in Pingliang City, Gansu Province. Located in the southeast of Gansu Province, it borders Changwu, Binxian, Linyou, Qianyang and Longxian in Shaanxi Province in the southeast. Li is from Longxi. Li is a great teacher of worship. Li was born with a surname of Won, and the great-grandson of Emperor Zhuan Xu and the leader of Dongyi tribe was appointed as an official. There are two ways to change Li's surname.