S.O.
I'm catholic and maybe this is not a very catholic thing to do, but you can just say they are catholic! It's not like there's some master directory of catholics and they can look it up. Might be too late for that if you've already revealed their identities. Anyway, I don't advocate lying ever, but for crying out loud - that's just stupid. Godparents are a serious thing. My husband and I don't have any brothers or sisters, or other catholic friends - so that's quite a pickle. Good Luck. Let me know if you find a cool catholic church in town. We gave up and go to St. Martin's Lutheran Church on 15th. They are traditional like catholicism (communion and all - sing the same songs), but not judgemental. Beautiful church too.