What's another way to say sponsors?

Witnesses?

BTW, you've provided your fiance's (non) religious stance and described your ethnicity. I can't quite figure out what you mean. Are you religious?

Is Atheist an ethnicity now? Anyway, I think you can still use the word sponsor. I don't feel that "sponsor" has a religious connotation.

I had to look up "wedding sponsors". Very interesting. I think "witnesses" is a pretty neutral term.

-Marriage and wedding customs in the Philippines-

The principal wedding sponsors, also known as "godparents" "special sponsors", "primary sponsors, "counselors", or "witnesses", are often chosen by the betrothed, sometimes on advice of their families. The usual is multiple pairs of godparents, typically twelve, composed of six godmothers (ninang), and six godfathers (ninong). Secondary sponsors consist of the usual Western entourage of bridesmaids and groomsmen. A special type of secondary sponsors are three pairs of wedding attendants, each responsible for the rites of lighting the wedding candles, placing the veil, and looping the cord around the couple during the service. Other official participants are children, usually males, with the roles of arras-bearer, ring-bearer, and sometimes Bible-bearer.

Your marriage... counsels? Role models? Advisors? Do any of those help?

Use sponsor. That's what my couples have always done, and there is no religious connotation to it at all.

Wow - I had never heard about this before. um...what about "mentors?"

I'm assuming you're Catholic? I'm Filipina and from my understanding, "sponsor" is actually not for the religious/Catholic aspect of the wedding. You can call them sponsors and it doesn't indicate any religion. I have sponsors and our ceremony is non-denominational.

The word "sponsors" makes me think that these people are going to have to pay for the wedding.

I like "mentors"...that seems to be an appropriate word.

Use sponsor. As others have mentioned, it's not related to religion.

Excuse me if I have this wrong (not a Spanish-speaker), but isn't it patrons or something similar?