As I noted in my essay on the first Wonder Girl, for some time I regarded the earlier character as one with the character who was essentially born in THE BRAVE AND THE BOLD #60 in 1965. But even though Bob Haney's script initially kept some continuity with the character from the WONDER WOMAN comic, any commonality was soon forgotten by both the writer and the readers of the TEEN TITANS feature.
In Haney's TITANS, Wonder Girl became her own character, strong and sassy, rather than a reflection of "Wonder Woman as a girl." Because this character was so dynamic, I suspect that few if any fans objected to the retconning in TEEN TITANS #22, where this Wonder Girl was revealed to be a mortal girl from man's world, who was taken in by Wonder Woman's Amazon sisters. given a boost from a miracle-making "purple ray" so that she too became a souped-up Amazon living on Paradise Isle. She also began using the everyday name "Donna Troy" as a salute to her mentor Princess Diana (the one with the lasso and the bracelets, that is). I guess "Troy" was chosen because it had a vaguely Greek-ish sound to it.
The second Wonder Girl's fame remained marginal in both the 1960s TEEN TITANS and a second iteration of it in the 1970s, though she made it into an animated TV series before Wonder Woman did, thanks to the Titans being adapted for segments of THE SUPERMAN/AQUAMAN ADVENTURE HOUR. However, thanks to her appearances in the 1980s series THE NEW TEEN TITANS, Wonder Girl's finally became a fan-favorite, thanks to her artistic depiction by George Perez and her characterization by Marv Wolfman, who had created her back-story in the 1960s story.
Sadly, due to the revisions of Wonder Woman series, the retcon-origin was no longer viable, since it depended on Wonder Woman and Paradise Isle having been known quantities in that narrative. After that, the poor girl was never the same. Over the ensuing years Wonder Girl would receive a dizzying number of reboots and retcons, to the point that I for one neither know nor care what she is these days-- much like another unfortunate victim of promiscuous rebootery, Marvel's hero The Falcon.
But when she was good-- she was very, very good.