Characters with complicated backstories aren’t anything new for comic books, but the Joker’s Daughter is a prime example of just how absurd character backgrounds can really get. Sometimes, writers will play around by giving a character an intentionally confusing backstory that leaves characters just as confused as the readers. This was definitely the case with Duela Dent aka the Joker’s Daughter, who left everyone confused about just who exactly she was.
https://screenrant.com/jokers-daughter-duela-dent-history-origin-explained/