Hi,
I am checking now.
The details are:
Jonathon Gill married Mary Clarkson on the 8/12/1788 at Kildwick - he was a husbandman of Silsden
Jonathon Gill married Mary Fortune on the 15/12/1815 at Kildwick - he was a nailmaker of Silsden
Now the baptism for James Gill that fitted his birthdate states he was baptised on the 3/1/1792, parents - Jonathon and Mary of Silsden (Jonathon listed just as a labourer)
It cannot be Jonathon and Mary Fortune as they were married 23 years after his baptism.
Any thoughts welcome and happy to do more checks if you want.