Incorrect fathers names on marriage certificates

[Milliepede]

Wondering how common it was that someone got the wrong first name for their father - or it was written down wrongly on the register.

I don't mean illegitimate children who made up a father, people who did have fathers, deceased at the time or not, and had previously appeared with them on a census.

Clutching at straws really to find someone who disappears off the radar and have looked at marriages that on the surface seem to fit but then the fathers names are always wrong   

In this particular case the boys father died when he was about 8. 

Any opinions welcome thank you.

[Smokey20]

I have one in 1896, father named as Samuel but should have been Simon.

Mother still around but married to another man (was actually never married to Simon though they are recorded as married on the 1881 census and for the births of their 4 children )  No death yet found for the father, though it said deceased on the marriage certificate.   

[smudwhisk]

I have one in 1841 (Thomas instead of Isaac) and another in 1844 (John instead of James).  The names are incorrect on the original registers not just GRO certificates, and this was confirmed by other information.  Both parties were able to sign their names and probably could read but it was still missed.

[iolaus]

I have one who names his father's cousin as his father, as his father died when he was a toddler and he then lived with this man (possibly his godfather?) and mother

[Meelystar]

I've got one, her mother had died when she was a year, her father when she was five. I haven't checked the original register though so it could be a transcription mistake. I eventually found concrete proof (1939 register) that she was who I thought but she did have a relatively unusual surname and her father a slightly more unusual occupation so it seemed 90% certain before proof.

[Marmalady]

I have a couple of instances of the wrong father's name being given on marriage certificate:

Frances Trant, daughter of William Trant gives her father's name as John Trant in 1855. There is no John Trant in the family so i have no idea where that name came from.

Fanny Calvert gave no fathers name on her marriage in 1870, despite the fact that her father Edward was alive & well and she appeared with him in censuses both before and after her marriage

[Meelystar]

Marmalady do you think it's possible Fanny Calvert's father was known to be someone else? It seems odd otherwise.

[Milliepede]

Your examples are encouraging thank you.  I will have to double check the likely looking marriages but how to prove it is the person I want with that crucial bit of information being wrong?

[Meelystar]

Did the father/brothers/sisters/uncles etc leave a will they might be named in? More likely to be successful if it's a woman.