Hi Lynne, my parents don't remember the name I'm afraid.
It would be worth obtaining the Marriage certificate which would give a few more clues!
also, just had a look on Ancestry and found a death record for Matthew Moneypenny in Conwy county dated 1950.
I find that although Findmypast is great for looking up the 1911 census, Ancestry is much better across all categories, and they are currently in the process of putting on the 1911 census in full, at the moment you can only search for head of households.