 Emperor Xiaowu's successor Emperor Wen of Western Wei is typically regarded, then, as the first emperor of Western Wei, formalizing the division of the empire.Yuan Xiu was born in 510, as the third son of Yuan Huai (元懷) the Prince of Guangping, a son of Emperor Xiaowen and a younger brother of the then-reigning Emperor Xuanwu.His mother Lady Li was Yuan Huai's concubine, although historical records were not clear on the issue.