Are there any people like Princess Zhu Huan, Wei Zi, Yongqi and Benjamin in history?

Princess Zhu Huan and Wei Zi have prototypes, but there is only one of them, an adopted daughter of Qianlong people. When they don't know whether they are one of our own, they use swallows to show that they are not one of our own, and Wei Zi to show that they are one of our own.

Yong Qi, the fifth son of Ganlong, is a candidate for the crown prince. She was kind and attached to the human body, but she died at the age of 25.

Benjamin should be a fictional character, but he should also have a prototype, at least a painter.