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- Cao Yi (曹佾) (courtesy name Gongbo (公伯 gōng bó))
- Cao Jing (曹景)
- Cao Jingxiu (曹景休)
- Cao You (曹友).
In historic records, there were several emperor-consorts Caos in the Song Empire, but only one became EmpressCishengguangxian (慈聖光獻皇后 cí shèng guāng xiàn huáng hoù) (1015–1079), the wife of the fourth Song emperor, Rénzōng (仁宗), none of whose children became an emperor.
However, this does not render the historical existence of the "Royal Uncle Cao" impossible as in pre-modern China, the address "uncle" also meant "brother-in-law". Sometimes specified as "wife-uncle" (妻舅 qī jiù) or as a respect, "little uncle" (舅子 jiù zǐ). Empress Císhèngguāngxiàn did have a younger brother named Cao Yi in historical record. But the given name of Royal Uncle Cao being Yi as well could be a post hoc.
Cao Guojiu's younger brother Cao Jingzhi (曹景植 cáo jǐng zhí) was a bully, but no one dared to prosecute him because of his powerful connections, not even after he killed a person. Royal Uncle Cao was so overwhelmed by sadness and shame on his brother that he resigned his office and left home.