When I was a pupil in school in N Wales, many would change allegiance depending on who won the FA cup or Division 1. I was an odd one sticking to one club and even odder supporting Norwich in N Wales (my father's fom Norwich btw so that's how it came about).

I think older (than school age) people probably were more consistent and arguably localish? with Liverpool, Everton, Man U and Man C common.

Chester and Wrexham were closer though and I can't think off hand of anyone I knew supporting them. That said, living in the Llandudno area, I can't off hand think of any reason (outside in the case of Wrexham wanting to support a Welsh club) why one would be feeling any (very loosely) "moral obligation" to support these clubs.