I have been looking at the Jones family in the censuses and it is confusing and I shall have to look again.
In 1861The family at 3,Wyddfyd Cottages,East Old Road has Owen Jones,65,copper miner but no other Jones.The others are daughters and 2 grandchildren,Elinor Edwards and Robert Davies. This seems to relate to an 1851 census at Twll y Mig with Owen Jones,56,Cathrine,52,G*or,10 and Robert Davies,8.I wonder whether you couldn't find Ellinor's baptism because the name could actually be mistaken for Gaynor.
In1841 there is the family at Morfa Upper Township as in the book but 10 years younger.If it is all the same family then Owen Jones came from Pensarn, Anglesey according to the 1861 census.
There are also lots of Owen Williams.He must have been born between 1827 and 1831,I think.We know his father was also known as Owen and that he came from Anglesey but we don't when he arrived in Llandudno so I am looking at the 1851 census to see if he is there but it is quite a task.