Even "simple" surnames such as my own can be mis-rendered, ending upas Paull, or Pawl. If you know other family names it is easier to track and easier to see if this particular person in the 1861 census is the same person as 10 years earlier in the 1851 census (for example).
It can also depend on where your family was from, what their occupation was, and how much they were likely to have moved around.
If you have more information on your Noddle, that matches up with the Noddles, you can always post what you have and ask for help in verifying they are the same person/family. There are an awful lot of helpful - and experienced - Wikitreers who would be happy to help you.