Want to include both my mom and dad's first names on wedding invite

What the D said... I've seen this a million times. Hard to believe google didn't deliver.

If your parents are paying, it would be worded along the lines of "Mr. and Mrs. (Last Name) request the honour of your presence at the wedding of their daughter (your name) to (FH name)."

ETA- what the D said....

Or the less formal "pleasure of your company"

I put first names just as the D suggested

It depends on the formality of the wedding. Mr. and Mrs. John Smith is kind of outdated in everyday life but usually reserved for the formality of a wedding invitation. This is an invitation to attend a beautiful wedding.. These are your parents. I am surprised google failed you. Check with the stationer for more details. If the wedding is really fancy, you opt for the British spelling of "Honour" . It has nothing to do with the heritage of the bride or groom.... Just a bit of elegance and class.

I agree with D

So why don't you want to say "Mr and Mrs Smith"? Because you'd rather your mom get more credit? I guess I don't know how you feel about taking a mans last name but personally, my husband and I share finances. Whether one of us worked extra and the other didn't, the money would still be from both of us.

If you want to use first names I would say:

Mr John and Mr Jan Smith

Or John and Jan Smith

This is what I did for mine! I mentioned both of my parents and they are divorced but have the same last name still and FH parents

Not on a wedding invitation it isn't. Weddings are the last remnant of the old days.