Yuchi Jiong
Yang Yichen's father Yuchi Chong (尉遲崇) was ethnically Xianbei and a distant relative of the general Yuchi Jiong. Yuchi Chong was a general during Northern Zhou and had his defense post at Mount Heng. At that time, the general Yang Jian was the commandant at nearby Ding Province (定州, roughly near Baoding, Hebei), and Yuchi Chong, believing Yang Jian to have great ambitions, befriended Yang Jian. After Yang Jian seized power as regent in 580, Yuchi Jiong, suspicious of Yang Jian's intentions, rebelled at Xiang Province (相州, roughly modern Handan, Hebei). When Yuchi Chong heard this, as he was a relative of Yuchi Jiong's, he threw himself into jail and begged Yang Jian for forgiveness. Yang Jian pardoned him and ordered him to report to the capital Chang'an to serve as one of Yang Jian's assistants. After Yang Jian seized the throne from Emperor Jing of Northern Zhou in 581, ending Northern Zhou and establishing Sui Dynasty as its Emperor Wen, he created Yuchi Chong the Duke of Qinxing. In 582, Yuchi Chong served under Daxi Zhangru (達奚長儒) in a campaign against Tujue's Shabolüe Khan Ashina Shetu, and while Daxi achieved victory, Yuchi died in the battle.