Hi Gougy,
Sorry not to have come back to you before but I have not been able to find anything that is a positive link.
There is a death entry for Elizabeth Smith Noble 2/1903 Bristol,born c 1822 who was possibly the widow that was living in 57 Egerton Road, Horfield BS in 1871, but that could be the wife of Charles perhaps.
Not so sure that the place of birth for Thomas Nobel in 1851 is Yatton, it is a bit difficult to be sure what it says.
Sorry I could not help any more but best of luck with the research and if you are really stuck, you can always send for the marriage cert of one of the children.
Regards,
Elizabeth