Sort of, some of my partner’s family are jacks. They aren’t from Swansea though and they don’t really have that civic chip on the shoulder attitude I’ve found from jacks I know from the city itself. In that sense they’re much like myself as I’m not a Cardiffian either so that second city/capital thing is meaningless to me. They’re proper football people, and sports generally, and aren’t really interested in the banter and are pretty civil - at least to my face! Haha.
So it’s a bit of a weird one, it’s almost like they support some other fairly inoffensive club we share a division with rather than a big rival.