Thank you, Pinkgirlythoughts, matching didn't overly concern me till I came onto this site, but ever since I've worried about it so I'm glad you think they match. We actually discounted Megan because we felt they matched too much and would be a bit twee!
Fifi25 - Niamh was actually our other choice for Molly but we couldn't agree on a spelling, I wanted Niamh and he wanted Neve. I still love the name for what it's worth.
K8ster: logically I know everyone can't like the same names and if we did all our children would have the same name but I want Cerys to like her name when she's older and when I get negative reactions I wonder... however I can't predict what Cerys will think and as one of the previous posters said it means love which is a rather lovely meaning and it is a name I have personally loved for a long time so I will just have to hope she does too and the pronounciation, spelling issues don't concern her too much.
Cookielove: I agree and again it hadn't overly concerned me before coming on here. In my mind Cerys is in the same category as other Welsh names such as Jennifer, Dylan, Megan which are commonly used throughout the UK. I hadn't realised people didn't know the name Cerys and would assume we had some Welsh connection.
Thank you to everyone who has taken the trouble to post, it has helped to know you all like the name. I'm very sleep deprived and I think that has contributed to my negative state of mind at the moment, however at this moment in time I'm feeling happier about it. I'm glad I wrote down my thoughts instead of worrying as I have been 