Dugu

Lady Dugu (, personal name unknown, 544 - 590s) was a duchess of the Northern Zhou dynasty. Her husband Li Bing was Duke of Longxi from 554 to 564 and Duke of Tang from 564 to 572. She was the fourth daughter of the Western Wei general Dugu Xin and one of the Dugu sisters.

She was given the posthumous name Empress Yuanzhen during the Tang dynasty, after her son Li Yuan ascended the throne.

Duchess Dowager Dugu suffered from poor health in her later life, and her daughter-in-law Duchess Dou assisted her in managing household affairs. According to official history, Dowager Dugu was once extremely sick and due to her reckless personality, several of her daughters-in-law refused to assist her (probably because their husbands were not her biological sons). Only Duchess Dou cared for her, and Dowager Dugu recovered after a month. Dowager Dugu was grateful and favored Duchess Dou.

She died before the Tang dynasty was founded in 618. Although Li Bing had many children, only Li Yuan and a daughter, known as Princess Tong'an during the Tang dynasty, were known to be born of Duchess Dugu.

According to Alphonse Mingana and Edward Harper Parker, Dugu might have been a "Nestorian" Christian.

In popular culture Li Yixiao portrayed as Dugu Mantuo (独孤曼陀) in The Legend of Dugu 2017 Chinese television series.