There's this one but no others with a father John that I can see at
1835 - Llanrwst Wesleyan circuit
Elizabeth d of John Jones, labourer, and Ann Jones (mistakenly?? written as Jane Williams*, spinster in the former name and mar status column) of Tai Rhes, Llanrwst. Mother resident at Llanrwst at marriage.
* the entry above was a Jane!!
This looks like their marriage, just in case it's yours:
26 August 1926 . Capel Garmon
Anne Williams of Llanrwst and John Jones of Gwytherin by license. Witnesses - John Jones and Margaret Jones
Gadget