You are right, I think, Diana but this is a baptism record. However it does record that the parents are married - ‘conj’ and ‘olim’ for Mary’s maiden name.
Pennines
You may be aware of this but there was a later baptism for John Leadbeater. The record you have posted has been corrected and does look to be ‘Joannes’ and ‘filius’ - John and son.
There is a baptism, 14th February 1830, with a birthdate 17th July 1829 with the same details.
This implies that the first John died and the later child named for him although I don’t see a death for him.
There is a death recorded for the child, Jesse, who was baptised in 1832 - records show ‘filia’ , daughter.
The transcript of the burial in ‘ England, Select Deaths and Burials, 1538-1991’ shows ‘male’.