And neither Daniel or Regina are blonde. I think that big of a plot point would need to be alluded to at some point in the first season – maybe have Emma and Regina having a strange-instant connection, similar habits, features, etc. Since all the above were done in connection to Snow and Emma – I’m pretty confident that is the mother/daughter pairing here.
Honestly, I’m still amazed sometimes by the resemblance between Ginnifer Goodwin and Jennifer Morrison. It’s pretty uncanny!