I wrote that post from memory. I've just checked and I've been reminded that Edwin's aunt Ann originally hails from Fewston, just north of Leeds per the 1861 census. (I checked the FreeCen site, and while an entry comes up for 1861, none does for 1851. But I have a record from that census as well, for a 6 year old Edwin, that I printed out a few years ago.)
1851
William Clegg, 33, plumber born Rochdale
Ann Clegg, wife, 36, born
Otley Yorkshire
Edwin R Rothwell, 6, nephew, born Rochdale
Fewston & Otley are a 3 hour walk apart.
Do you think it might be more likely that William is his maternal uncle, ie. that his mother was a Clegg too, in light of the middle name indicated in 1861, or would he take on that name having been adopted by a William Clegg?
he could be either - the son of William's sister who married a Mr Rothwell
or - the son of Anne's sister who married a Rothwell
I can't see a good Clegg-Rothwell marriage
so it does seem more likely that he is Anne's sister's child. But I don't think you should Assume
modified to add - that I believe Nephew could be a bit of a loose term too.
But I also can't see a good marriage for William Clegg a plumber!
Edwin might have simply taken on Clegg as an acknowledgement of his upbringing.