In history, many women didn't leave their names, just called Yu.
The princess married Dou Yi, Duke of SHEN WOO in the Northern Zhou Dynasty (5 19-582).
Dou Eyuan was a general in the Northern Zhou Dynasty. He was once the general manager of Dingzhou and one of the generals in Zhu Guo.
She gave birth to a daughter, Dou (about 569- about 6 13), and married Li Yuan, who was named Empress Taimu.
You can refer to Dou Yi and Dou Empress.
I hope it helps.