On SO, we sometimes see "branded" tags:
Is there any possibility of doing the same here? Would it even be a good idea?
I think these tags are "corporately sponsored" on SO (source?), which probably wouldn't make much sense here. So this question exists to find out primarily whether it's an option (from a technical/business perspective), and whether we would want to exercise such an option. If the answer to these questions are both 'yes', a further discussion likely would be appropriate to determine the criteria.
With that in mind, I offer the following only as an example, not as a specific recommendation:
Perhaps we would brand denominational tags with a sufficient number of questions. catholicism seems an obvious candidate (the only tag with > 1000 questions!). The next most popular denomination tag is lds with 262 questions.