Is there a DC female hero other than WW who isn't a spin-off of one of the men?
Other than the various Wonder Girls?
A non-comprehensive list:
Amethyst, Princess of Gemworld
Angel O'Day (of Angel and the Ape
Black Canary (technically originated as a guest character in Johnny Thunder backup strips, but quickly spun off on her own)
Isis (although her comics incarnation was tied into the Marvel Family due to her TV origins as a companion show to Shazam!
And that's not counting women who are part of mixed-gender team books, such as Starfire, Raven, Saturn Girl, Fire, Ice, Vixen, Katana, etc.