I love love love love Isabel almost shortlisting it. It feels incredibly stately and medieval. I also like Isabella and nicknames Izzy and Bella. But Isabel oh Isabel. The thing that concerns be about it is that it will be dated later, at around the same time any hypothetical Isabel would be produced
I don't see anything 'now' about Cecily. The combo feels a little dry for some reason - maybe it's Spanish + English feel that's putting me off - but it's very nice. I might rather Isabel Claudia or something more matched - ooh, or Claudia Isabel, Isabel bright and pretty and unexpected as a middle name.