Hi, do you have any other information on Daniel Kelly/Katherine Manley that is maybe their mothers maiden names.
It is difficult to pin them down for a baptism record, there wont be a civil birth record as these did not come into force until 1864 in Ireland, unless you have the location in CORK.
I see them on the 1851 uk census in Bristol with John 14, Daniel 11, Mary 9, William 5, Elizabeth 8. Also from the ages of parents Daniel seems to be about 20 years older than Katherine. His birth is given c. 1801 & Katherine c. 1821.
If you are able to source any more information, get back to me & I will take another look. Regards