Why are so many people called "Ya Nan"

Most of them are girls, and their parents are influenced by traditional ideas.

I think women are inferior to men, so I named them Asian men. Moreover, their old concept of son preference has not disappeared, and the name "Asian boy" may be used to appease their regret of not having a boy. This is inseparable from the concept of parents.

I have a friend who is a girl. Her name is Sheng Nan and her sister's name is Yanan.