news articles mistaken called Duela Dent gotham’s Original Harlequin, but she not. Link
I remember buying those Batman Family issues when they first came out.
The author should have made a note that there was an original Harlequin back in the golden age. Duala Dent is the first Harlequin on Earth-1 pre-crisis.
Harlequin is not only his nemesis, & secretary, but also eventually his wife (Alan Scott).