Hi there , thanks for your input, I had found the Amlwch website previously as you say an excellant site and from there found the 2 Catherine's you have mentioned, and I feel 100% certain that one of them is my Gt grandmother I believe she may have been living with her grandmother, I have followed through on census as I know she lived in Liverpool and she is shown there from 1861 with Richard Evans and Sarah Evans as her parents. Richard being born in Anglesey and Sarah in Aberystwyth, both Richard and Catherine are shown as coming from Carwen and I am as certain as you that it is Gaerwen.She is traceable on census from 1851 through to 1891 Up to now I have not been able to trace her birth cert with Richard as her father, but a marriage cert has turned up in Liverpool for Catherine married to my Gt Grandfather Richard Jones, but her fathers name is shown as William Evans, don't get to excited could he be yours.
The interesting point is that there is approx 6/7 years age difference between Catherine's parents her mother being the older and it has now been suggested that maybe perhaps her mother was widowed and had remarried, so now I am applying again for Catherine's birth cert and see if it can provide any more clues, if it does I will let you know , cheers for now Liverbird