Thank you both for your help and advice and it does seem like Cefn Canol is the place where she came from.. I do have a couple of questions
a) Does Llawnt mean Count in Welsh?
b) Would you giving me a bit of advice as to what were the parameters that you searched with to find her in the Census. I have looked and looked and have been unable to find the census concerned
The only other clue I have is from what my Mother once said that she came from Ruabon (which according to googlemaps) isn't too far from Cefn Canol
Below is the only picture of Margaret that we have
Once again thank you for your help it is very much appreciated