Board Thread:Character Discussion/@comment-546146-20131115195023/@comment-5106672-20131115212332

Anastasia Romanoff is a historical person and it wouldn't make sense for her to be transposed to the Enchanted Forest, so of course the two characters are unrelated.

Seders90, Ruby mentioned in The Price of Gold that Ashley had "a stepmother and two stepsisters she doesn't talk to", so Cinderella's stepsisters are supposedly both in Storybrooke at this time.