Yuwen Shu
Yuwen Zhiji (died 619) was a military officer of the Sui dynasty. He was the son of Yuwen Shu, the Duke of Xu. He was the younger brother of Yuwen Huaji and older brother of Yuwen Huiji (宇文惠及). He had another younger half-brother Yuwen Shiji. His ancestors were from Xiongnu descent with the surname Pòyětóu (破野头). The Poyetous later were naturalized to Xianbei ethnicity and changed their surname to Yuwen (宇文).