Hi
Yes I have a copy of John's marriage certificate, which gives his father as Francis. I have checked for a birth, but it looks like he was not registered, also on the 1871 census, Francis is lodging in a house with his daughter Eliza, born c1859, Newcastle, I have had a look for her birth, but too many to narrow it down.
I have looked for Francis's wifes death, but with no first name, that again is not easy.
Thanks you