Powergirl

[Miss Danvers]

Are Powergirl and Supergirl the same person? They both share the same parents and come from Argo City

[Super Monkey]

Yes and no

Pre-Crisis Powergirl was the Earth-2 version of Supergirl.

Post-Crisis Powergirl is a different person, an Atlantean princess at that.

[Miss Danvers]

Thanks for the info

I've actually been delving deeper into the backgrounds of Powergirl myself and other Superheroins.  Spidergirl especially has a cult following...