I like
Rebecca. I think it will still be around, but it won't be back around the top again.
Rebekah is the original biblical spelling. I think
Estella and
Rebecca are good for sisters. Most
Rebecca's I know are in their 20's or 30's. I think
Rebecca is still totally acceptable to use. "
Rebecca Lynn" was one of my favorite songs growing up. Most people will probably call her
Becca or
Becky though.