While the latter was a relatively small population, it contrasts to those aged 15 and under for all other religious identities who were more likely to live in these areas than those of working age.
Er mai poblogaeth gymharol fach oedd y grŵp olaf hwn, mae'n wahanol i'r grŵp 15 oed ac iau o fewn yr holl grefyddau eraill, a oedd yn fwy tebygol o fyw yn yr ardaloedd hyn na'r rhai o oedran gweithio.