Sybella is a little unusual so that is probably why people say they don't like it. I think it is one that grows on you. I've heard it a few times over the years and didn't like it at first but I do now. DTMS? My bosses daughter has a really unusual name (they made it up) and my first thought was "eww why?" but now I really like it. It is really pretty.

I also like Estella & Stella from your suggestions. I think both would grow well from little girl to adult.